Objective To understand the current job stability of space medical workers，explore the relationship between organizational commitment and job satisfaction in perceived organizational support and turnover intention，and provide theoretical basis for improving the working environment of space medical workers and improving the stability of space medical team in the future. Methods From January to March 2024，740 medical workers in the aerospace system of Beijing and Wenchang City of Hainan Province were selected as the research objects by the cluster sampling method.The organizational support，organizational commitment，turnover intention and job burnout scales were used as the research tools to qualitatively and qualitatively describe the organizational commitment，job satisfaction，job burnout and turnover intention of the respondents.The multiple linear regression model was used to analyze the influencing factors of turnover intention，and Bootstrap method was used to test the mediating effect. Results The total scores of scales in 740 aerospace medical workers in Beijing and Wenchang City of Hainan Province were：organizational commitment（91.70±15.69）points，job satisfaction（59.87±21.58）points，job burnout（35.03±9.97）points，and turnover intention（10.42±4.65）points.The predictive effects of organizational commitment，job satisfaction and job burnout on turnover intention of aerospace medical workers were statistically significant（all P<0.05）.The job satisfaction and job burnout formed a chain mediating effect in the process of organizational commitment affecting turnover intention，the effect value was -0.029（95%CI：-0.065--0.007），and the contribution rate accounted for 31.52% of the total effect. Conclusions The organizational commitment of aerospace system medical workers has a significant negative predictive effect on turnover intention，in which job satisfaction and job burnout constitute a dual mediating path. The path analysis showed that the two variables not only have an independent mediating effect between organizational commitment and turnover intention，but also form a chain mediating model.

Objective To compare the applicability of four occupational health risk assessment methods in key positions of natural gas long-distance pipeline compressor stations located in plateau and plain areas，provide a basis for implementing occupational hazard control measures. Methods A compressor station of natural gas long-distance pipeline in the plateau area and another in the plain area were selected as the research objects，and the one-site investigations and detection of occupational hazard factors were conducted in 2024.The occupational health risk level of key positions were evaluated by the classification of Occupational Hazardous Work in the Workplace（GBZ/T 229），the International Council on Mining and Metals（ICMM） model，the comprehensive index method of Technical Guidelines for Occupational Health Risk Assessment of Chemical Hazardous Factors in the Workplace（GBZ/T 298-2017） and the occupational hazard risk index method，and the results of the four risk assessment methods were compared. Results All the results of four risk assessment methods were standardized using risk ratios，the method of classification of occupational hazards in the workplace evaluated all chemical hazardous factors as low risk（2nd level），the comprehensive index method also assessed all chemical hazardous factors as low risk（2nd level），the ICMM quantitative method showed that noise was medium risk（3rd level） and chemical hazardous factors were negligible risk（1st level），and the occupational hazard risk index method evaluated all chemical hazardous factors as negligible risk（1st level）. A Fleiss Kappa consistency test was conducted using SPSS 25.0，and the result indicated a low overall agreement（Kappa=-0.202<0.2，P<0.01），which was statistically significant. Conclusions The evaluation results of occupational health risks from chemical hazardous factors in long-distance pipeline compressor stations in plateau and plain areas are consistent in each risk assessment method.However，the consistency of assessment results among the four methods is low.Each of the four methods is applicable to different aspects，and they can be used simultaneously to ensure the effectiveness of prevention and control measures.

Objective To analyze the occupational health examination data of workers in the lithium-ion battery manufacturing industry in Nanning City from 2020 to 2024，provide a basis for formulating occupational health regulations and standards tailored to regional and industry characteristics，additionally，to explorethe impact of major occupational hazard factors on workers' health and propose preventive measures. Methods The occupational health examination data of workers in the lithium-ion battery manufacturing industry in Nanning City from 2020 to 2024 were collected，and the data were analyzed. Results From 2020 to 2024，the number of workers in the lithium-ion battery manufacturing industry in Nanning City increased annually，with significant growth in 2023 and 2024. The number of workers undergoing health examination has jumped from 104 cases to 4 684 cases （a 44 fold increase），and the enterprises has increased from one to five. No cases of occupational diseases or suspected occupational diseases were detected in the past five years.However，noise- and dust-related contraindications were identified in 2023 and 2024. A total of 57 cases of occupational contraindications have been detected（accounting for 98.3% of the total number of occupational contraindications），including 42 concentrated outbreaks in 2023. There was only one dust-related contraindication（detected in 2023），and the cases were primarily noise-related contraindications，showing an increasing trend.These cases were mainly concentrated among male，young and middle-aged workers in large enterprises，with less than five years of work experience. The occupational health examination results of workers exposed to noise showed that the detection rate of high-frequency hearing loss was 10.48%（454/4 333）. There were statistically significant differences in the rate of high-frequency hearing loss among workers of different age，length of service and gender（χ²=52.349，19.74，43.591，all P<0.01）. The detection rate of high-frequency hearing loss showed a trend change with the age and length of service of workers，and the differences were statistically significant（χ²=52.349，19.740，both P<0.01）.The occupational health examination results of workers exposed to dust showed that the detection rate of abnormal lung function was 4.18%（127/3 037）. There were statistically significant differences in the detection rate of abnormal lung function among workers of different age，length of service，gender and company size（χ²=1.251，10.171，9.204，5.397，all P<0.01）. The detection rate of abnormal lung function showed a trend change with the age and gender of workers，and the differences were statistically significant（χ²=10.171，9.204，both P<0.01）. Conclusions The occupational health status of workers in the lithium-ion battery manufacturing industry in Nanning City from 2020 to 2024 requires enhanced protection，particularly for those exposed to noise. The standardize occupational health examinations，accurately identification and prevention of occupational diseases at an early stage are recommended，to safeguard workers' health.

Objective To investigate the relationship among work stressors，job burnout and presenteeism behavior for nursing staff，and explore the mediating effect of presenteeism behavior between work stressors and job burnout. Methods From July to August 2024，a convenience sampling method was used to select nursing staff from Tongzhou Maternal and Children Health Hospital as the research subjects. Nursing staff were investigated with job stressor scale，burnout inventory，presenteeism behavior questionnaire，and the correlation among nursing staff was analyzed. The mediating effect of presenteeism behavior was examined by testing procedures for mediating effects，and a structural model of work stressors，job burnout and presenteeism behavior were construct using SPSSAU to further verify the mediating effect of presenteeism behavior. Results The total score of job burnout of 190 nurses was （57.57±22.21）points，the total score of work stressors was （69.60±26.30）points，and the total score of presenteeism behavior was （5.06±2.16）points. The pearson correlation analysis results showed that nurses' work stressors were positively correlated with job burnout and presenteeism behavior（r=0.675，0.513，both P<0.05），and presenteeism behavior was positively correlated with job burnout（r=0.670，P<0.05）.Presenteeism behavior played a mediating role between work stressors and job burnout，with a mediating effect value of 0.169 and an effect proportion of 31.88%，which was similar to the mediating effect proportion of the structural model（31.19%）. Conclusion Work stressors and job burnout among nursing staff are at a medium level，and they exhibit high levels of presenteeism behavior. Presenteeism behavior as a mediating variable has an impact on job burnout.

Objective To establish an analytical method based on disk membrane solid-phase extraction（DMSPE） and gas chromatography-tandem mass spectrometry（GC-MS/MS） for the simultaneous determination of 208 semi-volatile organic compounds（SVOCs） in drinking water and source water. Methods A 1 000 mL water sample was dechlorinated，mixed with 5 mL methanol，and subjected to enrichment and clean-up using DMSPE. The analytes were eluted sequentially with 3 mL of ethyl acetate and 3 mL of dichloromethane，concentrated to near dryness under a nitrogen stream at 40 ℃，and reconstituted in 1 mL of ethyl acetate-dichloromethane（8∶2，V/V）. Separation was performed on an HP-5MS Ultra Inert column（30 m×250 μm×0.25 μm） with electron ionization（EI）. Detection was carried out in dynamic multiple reaction monitoring（dMRM） mode，and quantification was achieved using a working curve method. Results All 208 target compounds were well separated，showing good linearity（r>0.995） within their respective concentration ranges. The method detection limits ranged from 0.012 to 2.200 ng/L，and the quantification limits ranged from 0.047 to 7.400 ng/L. In spiked water samples，the average recoveries of the target compounds were 70.0%-130.0%，with relative standard deviations（RSD） of 0.45%-18.30%. Conclusion The developed method is simple，rapid，and demonstrates high throughput，high sensitivity，good precision，and accuracy. It is suitable for routine monitoring and emergency detection of multiple SVOCs in drinking water and source water.

Objective To analyze the pathogenic composition of 103 childhood patients with diarrhea in one district of Beijing in 2023，provide basic data for prevention and control of childhood diarrhea. Methods The basic information and stool samples of childhood patients with diarrhea in one district of Beijing were collected from May to October 2023. The fluorescent polymerase chain reaction（PCR） and bacterial culture were performed for common diarrhea causing bacteria，viruses，and parasites detection，and whole-genome sequencing was performed in isolates in this study. Results Totally 73 of 103 patients with childhood diarrhea were detected with at least one pathogen，with a positive rate of 70.87%. The top three bacterial pathogens were Diarrheagenic Escherichia coli（16.50%），Salmonella（9.71%），Clostridium perfringens（6.80%），while top three virus pathogens were enteric adenovirus（16.50%），norovirus（13.59%），astrovirus（8.74%），and the parasites were all negative.The detection rate of co-infection（defined as the detection result is positive with two or more pathogens in a single patient） was 31.51%. The five isolates of Aeromonas were all A. veronii，and two isolates of Cronobacter were both C. sakazakii and belonging to the ST4 type. Conclusion This study presenting a higher pathogen detection rate in childhood patients with diarrhea in one district of Beijing，and it deserves attention to co-infection in childhood patients with diarrhea，and the identification or isolation for the pathogens such as Cronobacter，Aeromonas and Campylobacter urealyticum.

Objective By testing the sodium cyclamate contents in commercially available food in Handan City，to investigate the distribution of sodium cyclamate in food in Handan City，and assess the potential dietary intake risks for local residents，so as to provide data support and scientific basis for relevant departments to make decisions. Methods From 2014 to 2024，referring to the gas chromatography（Method 1） and high-performance liquid chromatography（Method 2） protocols outlined in GB/T 5009.97-2003 and GB 5009.97-2016 "National Food Safety Standard-Determination of Cyclamate in Food"，the sodium cyclamate content in 377 food samples across nine categories collected in Handan City between 2014 and 2024 were analyzed. The sodium cyclamate content in various samples were evaluated according to GB 2760-2024 "National Food Safety Standard-Standard for the Use of Food Additives". The Monte Carlo simulation method was used to establish a risk assessment model，to estimate the daily exposure levels and risk probabilities of sodium cyclamate intake among Handan residents. Results Totally 377 samples of commercially available food in Handan City were tested，the sodium cyclamate was detected in 61 samples with total detection rate of 16.0%. The sodium cyclamate was detected in alcoholic beverages，soft drinks，frozen desserts，baked goods，roasted nuts and seeds（both shelled and unshelled），and jellies，but not in puffed snacks or mooncakes.The total qualified rate was 99.5%.The risk assessment results indicated jellies had the highest average hazard quotient（0.028 8），while unshelled nuts and seeds had the lowest average hazard quotient（0.000 3），the hazard quotientsof all samples were less than 1，indicating that the overall health risk was at a relatively low level. Conclusion The overall sodium cyclamate exposure risk for Handan residents remains within safe limits，however，relevant departments still need to continue monitoring the content of sodium cyclamate in food.

Objective To understand the characteristics of body mass index（BMI） of adult residents in Hebei District of Tianjin in 2023 and its impact on common chronic diseases，in order to provide a basis for formulating relevant prevention and control strategies and measures. Methods In 2023，a survey project on social factors related to chronic disease prevention and control was conducted in Hebei District of Tianjin. Residents aged ≥18 were randomly selected through multi-stage stratified cluster sampling，and the survey was conducted using questionnaires and physical examinations，and the data were analyzed. Results A total of 2 048 people were surveyed，with an average BMI of （24.48±3.78）kg/m². The overweight rate was 38.77%，with a standardized rate was 38.92%. The obesity rate was 14.31%，with a standardized rate of 14.86%. The central obesity rate was 43.85%，with a standardized rate of 44.02%. There were statistically significant differences in the distribution of overweight among individuals of different genders，ages，educational levels，marital status，smoking，alcohol consumption，and waist circumference（all P<0.01）. There were also statistically significant differences in the distribution of obesity among individuals of different genders，smoking levels，and waist circumference（all P<0.01）. The risk of hypertension，diabetes and stroke in overweight people was 1.79 times（95%CI：1.38-2.31），1.64 times（95%CI：1.16-2.33） and 2.24 times（95%CI：1.28-3.93） than in normal people. The risk of hypertension，diabetes，stroke and myocardial infarction in obese people was 4.50 times（95%CI：3.19-6.36），2.55 times（95%CI：1.65-3.94），2.30 times（95%CI：1.14-4.65） and 3.80 times（95%CI：1.60-9.01） than in normal people（all P<0.01）. Conclusion The overweight and obesity rates among adult residents in Hebei District of Tianjin are at a high level and active prevention and control methods should be done to decrease the overweight and obesity rates among people，thereby lowering the incidence of related chronic diseases.

Objective To understand the status of knowledge，belief，practice of occupational lower extremity varicose vein among operating room nurses in three grade-A tertiary hospitals in Guizhou Province，analyze various factors that affect knowledge，belief，practice，and provide basis for formulating targeted intervention strategies in the future and reducing the incidence rate of varicose veins in lower limbs of nurses in the operating room. Methods Between December 2024 and January 2025，a survey of 236 operating room nurses in three grade-A tertiary hospitals in Guizhou Province was performed using the convenience sampling method combined with a general information questionnaire and the knowledge，belief，practice scale of occupational lower extremity varicose vein，and the data were analyzed. Results The knowledge score of 236 operating room nurses was （77.43±7.02） points，the attitude score was （30.15±7.05）points，and the behavior score was （24.25±8.69）points. The monthly income（t=1.482），educational attainment（F=5.886），and years of work experience（F=9.377） were the influencing factors of knowledge dimension of occupational lower extremity varicose vein among operating room nurses. The age（F=3.668），years of work experience（F=12.244），and engagement in preventive exercises（t=2.861） were the influencing factors of attitude dimension of occupational lower extremity varicose vein among operating room nurses. The sex（t=2.753） and engagement in preventive exercises（t=0.459） were the influencing factors of practice dimension of occupational lower extremity varicose vein among operating room nurses. Conclusions The knowledge of 236 occupational lower extremity varicose vein among operating room nurses in three hospitals in Guizhou Province is more abundant，but attitudes and practice need to be improved.Nursing managers should develop individualized training programs based on factors contributing to occupational lower limb varicose veins among operating room nurses，strengthen their training and actively promote standardized implementation among nurses，so as to prevent the occupational lower extremity varicose veins among operating room nurses.

Objective To explore the chain mediating role of nurses' job crafting and thriving at work between occupational future time perspective and innovative behavior，provide a basis for improving nurses' innovation behavior. Methods The nurses from four tertiary hospitals in Sichuan Province from January to February 2025 were selected by the convenient sampling method. Totally 392 nurses were investigated by the general data questionnaire，the occupational future time perspective scale，the job crafting scale，the thriving at work scale，and the innovative behavior scale. And the data were analyzed. Results The scores of occupational future time perspective，job crafting，thriving at work，and innovative behavior among 392 nurses were （31.58±5.82），（75.67±11.55），（50.31±8.20） and （31.51±8.61）points，respectively. The innovative behavior was positively correlated with occupational future time perspective（r=0.520，P<0.01），job crafting（r=0.640，P<0.01），and thriving at work（r=0.583，P<0.01）. The Job crafting and thriving at work played a chain mediating effect between occupational future time perspective and innovative behavior，and the mediating effect value was 0.026（95%CI：0.011-0.044），accounting for 5.73% of the total effect value. Conclusions The occupational future time perspective can directly affect innovative behavior，and can also indirectly affect innovative behavior through the chain mediation effect of job crafting and thriving at work. The nursing managers can enhance the innovative behavior of nurses by improving their level of occupational future time perspective and promoting job crafting and thriving at work.

Objective To investigate the current situation of disease susceptibility perception disease among rural elderly in Hunan Province and analyze its influencing factors，in order to provide a reference basis for reducing disease susceptibility perception and promoting healthy aging among the elderly. Methods From July to August 2024，410 elderly people from six rural areas in Hunan Province were selected by using the convenience sampling method as the research objects. They were investigated by the general information questionnaire，disease susceptibility perception scale，living space limitation scale and wisdom-based well-being scale. The multiple linear regression was used to analyze the influencing factors of disease susceptibility perception among rural elderly people. Results The score[M（P₂₅，P₇₅）] of disease susceptibility perception of 410 rural elderly people in Hunan Province was 39.00（33.00，50.25）points. There was a negative correlation between disease susceptibility perception and wisdom-basedwell-being（r=-0.699，P<0.01）. The multiple linear regression analysis showed that age，health status in the past six months，limited living space and wisdom-based well-being were the influencing factors of disease susceptibility perception（all P<0.05），explaining 56.9% of the total variation. Conclusions The disease susceptibility perception of 410 rural elderly people in Hunan Province is at a moderately low level，affected by age，health status in the past six months，limited living space and wisdom-based well-being. It is suggested that medical workers should take relevant measures to reduce the level of disease susceptibility perception among the elderly.

Objective To analyze the iodine nutrition level of key populations in iodine adequate areas surrounding water-borne iodine excess areas in Taiyuan City，provide a basis for scientific and precise iodine supplementation in such areas. Methods In iodine adequate area surrounding water-borne iodine excess area in Taiyuan City from 2020 to 2023，the drinking water samples were collected from residents in each administrative village to test the iodine content in water. Totally 100 children aged 8-10 years old were selected to examine goiter and thyroid nodule by ultrasound B（if the number of participants is insufficient，the age range would be expanded 6-12 years old）. And 50 children and 20 pregnant women（if the number is insufficient，all will be selected） were tested for their household salt iodine and random urine iodine content. Results There were 45 adequate iodine villages surrounding water-borne iodine excess areas in Taiyuan City. A population survey was conducted in 32 iodine adequate villages，the median water iodine content was 76.6 μg/L. Totally 1 941 children were surveyed，the coverage rate of iodized salt was 74.9%，the qualified iodized salt consumption rate was 69.5%，the median urinary iodine concentration was 303.9 μg/L，the goiter rate was 5.9%，and thyroid nodule detection rate was 22.2%. Totally 180 pregnant women were surveyed，the coverage rate of iodized salt was 74.4%，the qualified iodized salt consumption rate was 68.3%，and the median urinary iodine concentration was 178.0 μg/L. Among children in the iodized salt group，the median urinary iodine concentration（317.7 μg/L） was higher than that among children in the non-iodized salt group（281.0 μg/L），the difference was statistically significant（Z=2.046，P<0.01）. The goiter rates in two groups were 6.4% and 4.5% respectively，the thyroid nodule detection rates were 23.8% and 21.1% respectively，and the differences were not statistically significant（χ²=2.039，1.168，both P>0.05）. The analysis was performed based on stratifying water iodine levels（40-<70，70-100 μg/L），the median urinary iodine concentration among children in iodized salt group was 274.1 and 334.8 μg/L，which were higher than those in non-iodized salt group（241.8 and 294.8 μg/L）. When the water iodine content was 40-<70 μg/L，the thyroid nodule detection rate（27.9%） of children from the iodized salt group was higher than that in children from the non-iodized salt group（15.5%），all differences were statistically significant（all P<0.01）.After stratification，the goiter rates of children in two groups were 5.70%，2.70% and 6.70%，5.10%，respectively，and the differences were not statistically significant（χ²=1.564，0.953，both P>0.05）. The median urinary iodine concentrations of pregnant women in the iodized salt group and the non-iodized salt group were 179.0 and 171.0 μg/L. According to the water iodine stratification，the median urinary iodine of pregnant women was in an appropriate state，and the differences were not statistically significant（all P>0.05）. No correlation was observed among the goiter rate or thyroid nodule detection rate in children with salt iodine and water iodine，and no correlation was observed between thyroid nodule detection rate and urine iodine level（all P>0.05）. There was correlation among the goiter rate in children with urine iodine level（r=0.068，P<0.01）. Conclusions The residents in iodine adequate area surrounding water-borne iodine excess area in Taiyuan City primarily consume iodized salt，and the iodine nutrition level of pregnant women is adequate. The children in areas with iodine levels of 40-<70 μg/L，regardless of whether they consume iodized salt or not，have appropriate iodine nutrition. The children in the iodized salt group in areas with iodine levels of 70-100 μg/L have reached iodine excess level. It is recommended to dynamically monitor the iodine content in water and salt，urinary iodine levels in key populations，and thyroid health of children in iodine adequate areas，adjust prevention and control measures in time based on the water iodine content，surrounding environment，and iodine nutrition level of key populations.

Objective To analyze the concentration characteristics of fine particulate matter（PM_2.5） and water-soluble anions and cations in Xingtai City，provide data support for the prevention and control of PM_2.5 pollution in Xingtai City and the joint prevention and control of air pollution in the Beijing-Tianjin-Hebei region. Methods From January 2020 to December 2024，PM_2.5 samples were collected monthly at two monitoring sites in Xingtai City. The mass concentrations of NO₃^-，SO₄^2-，NH₄⁺，Cl^-，and F^- were measured using ion chromatography. The sulfate nitrate ammonium（SNA） was calculated，and the data were analyzed. Results From 2020 to 2024，PM_2.5 mass concentrations in Xingtai City showed a declining trend.The median（M） concentrations of water-soluble anions and cationsranked as follows：NO₃^->SO₄^2->NH₄⁺>Cl^->F^-. There were statistically significant difference in mass concentrations of PM_2.5 and water-soluble anions and cations among different years and seasons（H=57.388，257.567，60.040，79.503，60.706，37.726，8.647，all P<0.01）. The seasonal variations in PM_2.5 peaked in winter，with SNA（NO₃^-，SO₄^2-，NH₄⁺） and Cl^-exhibiting consistent seasonal trend with PM_2.5. The NO₃^-/SO₄^2- ratio was 1.24 in Xingtai City from 2020 to 2024，and the mean sulfur oxidation ratio（SOR） and nitrogen oxidation ratio（NOR） were significantly higher than 0.1. The differences in SOR and NOR were statistically significant among four seasons（H=14.274，9.928，both P<0.05）. Conclusions The prevention and control effect of air pollution is significant in Xingtai City from 2020 to 2024，but the situation remains severe，particularly severe winter pollution. The main sources of pollution include secondary aerosols，mobile emissions，and stationary sources. The management of industrial coal combustion and fuel-powered vehicles is critical for further air quality management.

Objective To investigate the current status and influencing factors of e-Health literacy and healthy lifestyles among medical students in a medical university in Xinjiang，and to explore the mechanisms underlying their relationship. Methods In July 2024，a questionnaire survey was conducted among 303 medical students at a medical university in Xinjiang using a demographic information questionnaire，a mobile e-health literacy scale，and a healthy lifestyle assessment scale，and the data were analyzed. Results The average score for e-health literacy among medical students at a medical university in Xinjiang was （42.47±6.55）points，and the average score for healthy lifestyle was （37.75±5.52）points.There were statistically significant differences in e-Health literacy scores of medical students with different parents' educational level，health perception，self-rated health status，daily internet usage duration，frequency of using Internet-based medical platforms，satisfaction and trust（all P<0.05）. The total score of e-Health literacy among medical students was positively correlated with the total score of healthy lifestyle（r=0.527，P<0.01）. Additionally，frequency of use，satisfaction，and trust in Internet medical platforms were positively correlated with both e-Health literacy and healthy lifestyle（r=0.239，0.364，0.305，0.151，0.323，0.291，all P<0.01）. e-Health literacy had a significant positive effect on mental health，regular lifestyle and physical exercise（β=0.771，0.654，0.338，all P<0.01）. Conclusion The e-Health literacy and healthy lifestyle levels among medical students at a medical university in Xinjiang are at a moderate level. Demographic variables，health perceptions，self-rated health，Internet usage，digital health information access，and the use and evaluation of Internet medical platforms are all the influencing factors of their e-Health literacy. Higher e-Health literacy is associated with healthier lifestyles，greater adherence to regular routines，and improved mental well-being. Universities should implement targeted interventions to enhance students’ e-Health literacy to promote overall physical and psychological health.

Objective To retrospectively analyze the characteristics and influencing factors of clustered influenza like cases in schools in Jing'an District of Shanghai from 2019 to 2023，in order to provide a basis for improving the prevention and control of infectious diseases in schools. Methods The distribution characteristics of clustered influenza like cases in schools reported in Jing'an District of Shanghai from 2019 to 2023 were analyzed，while the current status of school prevention and control facilities such as material reserves，isolation classroom settings，and health teacher prevention and control literacy was explored，and the data were analyzed. Results Among 105 reported cases，the year with the highest concentration of influenza like cases was 2019（54.29%），followed by 2023（37.14%）. The report month showed a unimodal distribution，mainly concentrated between November and March of the following year，with the most frequent month being December（38.10%），followed by February（14.29%）. Among different school stages，the incidence of clustered epidemics was the highest in primary school（58.82%），junior high school（38.89%），and high school（31.58%）（χ²=45.115，P<0.05）. The accumulated number of cases from a single epidemic were primary school>junior high school>high school（H=45.447，P<0.05）. The average duration of the epidemic were primary school>high school>junior high school（H=46.432，P<0.05）. The setting of separate passages and toilets in the isolation classroom，as well as the awareness of the definition of clustered epidemics and high incidence seasons by health teachers are influencing factors（all P<0.05）. Conclusions According to the research results，non hygiene professionals such as cleaning staff who carry out disinfection work should receive strengthened training，and isolation measures should be strictly implemented. At the same time，the main factors affecting the incidence and scale of clustered epidemics，such as high incidence seasons and definitions of clustered epidemics，should be taken into account to prevent the occurrence and spread of clustered epidemics.

Objective To investigate the influence of the sense of life meaning of medical students in private colleges on their attitudes towards death，and the mediating role of self-identity in them，in order to provide scientific basis for cultivating a positive outlook on life and death and improving self-identity among medical students in private universities. Methods In May 2024，a survey was conducted on 1 230 medical students from a private university in Changsha using the meaning of life scale，death attitude scale，and self-identity scale through simple random sampling，and the data were analyzed. Results The average score for the sense of meaning in life，attitude towards death，and self-identity among students from private universities surveyed was （4.90±0.96），（2.79±0.45） and（2.82±0.33）points，respectively. The comparison of sense of life meaning and self-identity scores among medical students with different family economies showed statistically significant differences（F=8.823，4.954，both P<0.01）.The comparison of death attitude scores among medical students of different genders showed that females scored significantly higher than males，and the difference was statistically significant（t=2.617，P<0.01）. The correlation analysis results showed that medical students' sense of meaning in life was positively correlated with their natural acceptance of death attitude（r=0.14，P<0.01），and their sense of self-identity was positively correlated with their sense of meaning in life and their natural acceptance of death attitude（r=0.384，0.182，both P<0.01）. The self-identity of medical students in private colleges played a partial mediating role between the sense of life meaning and attitudes towards death，with the mediating effect accounting for 41.758% of the total effect. Conclusion The sense of life meaning of medical students in private colleges can not only directly predict their attitudes towards death but also indirectly predict their attitudes towards death through self-identity. In private medical education，targeted education on the view of life and death should be provided for medical students to enhance their identification with themselves，their major，and their profession，broaden the educational path for the humanistic quality of medical students，and cultivate medical talents in the new era.

Objective To systematically evaluate the prevalence and influencing factors of compassion fatigue among emergency medical staff，providing evidence-based guidance for developing intervention strategies. Methods A comprehensive search of PubMed，the Cochrane Library，Web of Science，Embase，CNKI，Wanfang，VIP，and CBM databases was conducted to identify literature related to compassion fatigue among emergency medical staff，and the retrieval time limit is from the establishment of the database to September 2024. Two researchers independently screened the literature，extracted data，and cross-checked the results.The study quality was assessed using the agency for healthcare research and quality（AHRQ） rating criteria. Meta-analysis was performed using RevMan 5.4 and Stata 17.0. Results A total of 22 studies involving 7 315 emergency medical workers were included.The random-effects model showed that the prevalence of moderate to severe compassion fatigue among emergency medical staff was 75.47%（95%CI：71.132%-79.814%）. The subgroup analysis indicated that sample size differences might be the primary source of heterogeneity（differences between subgroups P=0.041）. The work stress，low job satisfaction，low social support，and workplace violence were risk factors for compassion fatigue among emergency medical workers（OR=1.491，1.334，1.303，2.272，all P<0.05）. The sensitivity analysis and publication bias tests indicated that the combined results were robust. Conclusions The compassion fatigue is highly prevalent among emergency medical staff and is significantly influenced by factors such as work stress，low job satisfaction，low social support，and workplace violence.Targeted interventions，such as psychological support，improving work environments，enhancing teamwork，and increasing job satisfaction，are recommended to reduce compassion fatigue and its negative impacts on emergency medical staff.

Objective To understand the sleep status and influencing factors of peacekeeping officers and soldiers，provide a basis for targeted intervention of sleep disorders. Methods By using the general information questionnaire and the Pittsburgh sleep quality index（PSQI），a cross-sectional survey was conducted on the sleep quality of 213 peacekeeping officers and soldiers of a certain unit in September 2021 and August 2022 respectively，to analyze the influencing factors of sleep quality. Results The total PSQI score[M（P₂₅，P₇₅）] of peacekeeping officers and soldiers before the task was 2.00（1.00，4.00）points，while the total PSQI score[M（P₂₅，P₇₅）] in the context of crisis was 3.00（1.00，6.00）points，and the difference was statistically significant（Z=-3.068，P=0.05）. The age，marital status，number of children，educational level，job title，position and peacekeeping experience were the factors affecting the sleep quality of peacekeeping officers and soldiers in the context of crisis. Conclusions The sleep quality of peacekeeping officers and soldiers needs to be improved，and work experience is an important influencing factor. Providing logistical support services for peacekeeping officers and soldiers and actively promoting correct ways to relieve stress have a positive effect on improving the sleep quality of officers and soldiers.

Objective To analyze the surveillance status of adverse events following immunization（AEFI） in Cangzhou City from 2020 to 2024，evaluate the safety of vaccination，and provide scientific evidence for standardized vaccination. Methods AEFI surveillance data and vaccination doses were collected from the Chinese Disease Prevention and Control Information System and the Cangzhou City Immunization Program Information Management System. The distribution characteristics of AEFI were analyzed through descriptive epidemiology. Results A total of 7 780 AEFI cases were reported in Cangzhou City from 2020 to 2024，with an average annual reporting incidence rate of 59.77/100 000 doses. There was a statistically significant difference in the reporting incidence rate of AEFI among different years（χ²=301.584，P<0.01）. The majority of AEFI cases were general reactions（99.15%），mainly including fever，redness，and swelling. The abnormal reactions accounted for 0.73%. The male-to-female ratio was 1：0.84，and the age was mainly concentrated in 0-<7 years old（92.74%）. The reporting time was mainly in the second and third quarters（55.10%），and AEFI cases occurred mainly within 1 day after vaccination（92.34%）. 99.74% of the cases had improved or recovered. Among the 34 vaccines with AEFI reports，the top three vaccines with the highest reported incidence were diphtheria-tetanus-acellular pertussis vaccine（42.74%），measles vaccines（9.63%），and diphtheria-tetanus vaccine（8.06%）. The top three vaccines with the highest reporting incidence rates were herpes zoster vaccine（354.02/100 000 doses），diphtheria-tetanus-acellular pertussis vaccine（332.90/100 000 doses），and diphtheria-tetanus vaccine（131.25/100 000 doses）. The year with the highest number of reported cases and the highest incidence rate within the five years was 2024（2 860 cases，75.66/100 000 doses）. Conclusion The AEFI surveillance system in Cangzhou City from 2020 to 2024 operates normally，and the safety of vaccination is good.

The circular RNA（circRNAs） is a unique type of RNA molecule by a closed loop structure present in various organisms.This circular configuration imparts greater stability to circRNAs compared to linear RNA，and it showcases traits such as diversity，universality，stability，specificity and conservatism.In clinical settings，diseases are often diagnosed at advanced stages，missing the optimal treatment window.Numerous studies have shown that circRNAs can be detected in body fluids，and their unique expression profiles are closely linked to disease progression.Therefore，circRNAs present in body fluids hold promise as a novel biomarker for disease diagnosis.This paper provides a comprehensive review of the differential expression levels of circRNAs in body fluids across various disease states.

AIDS，namely "acquired immunedeficiency syndrome"（AIDS），is an infectious disease caused by human immunodeficiency virus（HIV） infection. With the advent of anti-retroviral therapy（ART），AIDS has transformed from a fatal disease into a manageable and treatable chronic disease，significantly prolonging the life expectancy of patients. Due to factors such as HIV infection，side effects of drugs and age，it has a serious impact on the physical，psychological and social aspects of patients，seriously affecting the quality of life of patients. Evidently，paying attention to the quality of life of HIV-infected individuals/AIDS patients is crucial forimproving clinical outcomes. Therefore，this article briefly introduces the current situation of the quality of life of HIV-infected individuals/AIDS patients and the development process，main contents and application status of existing assessment tools，and analyzes their characteristics and application predicaments，so as to provide references and insights for selecting appropriate assessment tools for clinical research，developing assessment tools for the quality of life of HIV-infected individuals/AIDS patients that align with the cultural background of our country，optimizing the management of the quality of life forHIV-infected individuals/AIDS patients，and improving clinical decision-making.

This review explains the concept，theory，and health benefits of zero-time exercise，analyzes the acceptance and adherence to it，points out the shortcomings and future prospects，proposes the importance of constructing personalized and precise exercise prescriptionsbased on the individual differences in the health status of chronic disease patients，and promotes the deep integration of technology and multimodal interventions. The reasonably utilizing artificial intelligence combined with wearable devices is effective to promote active health behavior in patients. Further interdisciplinary cooperation is needed to provide theoretical basis and practical reference for developing personalized and precise exercise plans for chronic disease patients.

The occupational burnouthas become a common mental health issue among pediatric nurses，significantly impacting their physical and mental well-being，the quality of nursing care，and the operational efficiency of healthcare institutions.This paper systematically reviews relevant literature to comprehensively summarize the current situation and research progress of occupational burnout and its interventions in pediatric nursing，proposes practical and feasible clinical practice suggestions to provide direction for subsequent research，ultimately promoting the occupational health development of pediatric nurses and improving the quality of nursing services.

With the comprehensive implementation of the Healthy China Strategy，the integrated traditional Chinese and Western medicine diagnosis and treatment model has gained increasing popularity，and Chinese-Western medicine hospitals are playing an increasingly vital role in the healthcare system. The medical staff in these institutions face more complex and diverse occupational exposure risks while integrating distinctive TCM techniques（such as acupuncture and cupping） with Western invasive procedures.These risks not only pose serious threats to their physical and mental health but also present numerous challenges to healthcare quality and patient safety.This paper systematically reviews domestic and international research progress on occupational exposure risks among healthcare workers，elucidates the current situation in Chinese-Western medicine hospitals，analyzes key influencing factors，proposes targeted protective and intervention measures，and explores future research directions related to occupational exposure risks.The study aims to provide theoretical foundations for developing scientific protection strategies and improving occupational exposure prevention and control systems to safeguard healthcare professionals' occupational health and safety.