全文获取类型
收费全文 | 124061篇 |
免费 | 7735篇 |
国内免费 | 1021篇 |
专业分类
耳鼻咽喉 | 1323篇 |
儿科学 | 3457篇 |
妇产科学 | 3040篇 |
基础医学 | 15788篇 |
口腔科学 | 2818篇 |
临床医学 | 9768篇 |
内科学 | 28956篇 |
皮肤病学 | 2455篇 |
神经病学 | 11469篇 |
特种医学 | 4874篇 |
外国民族医学 | 23篇 |
外科学 | 18950篇 |
综合类 | 1703篇 |
一般理论 | 53篇 |
预防医学 | 6571篇 |
眼科学 | 2078篇 |
药学 | 9495篇 |
3篇 | |
中国医学 | 568篇 |
肿瘤学 | 9425篇 |
出版年
2023年 | 687篇 |
2022年 | 1576篇 |
2021年 | 2725篇 |
2020年 | 1729篇 |
2019年 | 2425篇 |
2018年 | 3009篇 |
2017年 | 2257篇 |
2016年 | 2486篇 |
2015年 | 2817篇 |
2014年 | 3739篇 |
2013年 | 5200篇 |
2012年 | 7229篇 |
2011年 | 7333篇 |
2010年 | 4668篇 |
2009年 | 4153篇 |
2008年 | 6459篇 |
2007年 | 6577篇 |
2006年 | 6221篇 |
2005年 | 6036篇 |
2004年 | 6257篇 |
2003年 | 5804篇 |
2002年 | 5773篇 |
2001年 | 3825篇 |
2000年 | 3780篇 |
1999年 | 3112篇 |
1998年 | 1369篇 |
1997年 | 1057篇 |
1996年 | 987篇 |
1995年 | 942篇 |
1994年 | 838篇 |
1993年 | 804篇 |
1992年 | 1866篇 |
1991年 | 1823篇 |
1990年 | 1564篇 |
1989年 | 1479篇 |
1988年 | 1368篇 |
1987年 | 1210篇 |
1986年 | 1204篇 |
1985年 | 1070篇 |
1984年 | 810篇 |
1983年 | 737篇 |
1982年 | 498篇 |
1981年 | 416篇 |
1979年 | 582篇 |
1978年 | 431篇 |
1975年 | 439篇 |
1974年 | 493篇 |
1973年 | 465篇 |
1972年 | 425篇 |
1971年 | 395篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
22.
Maria Russo Claudio Lucifora Francesco Pucciarelli Bruno Piccoli 《La Medicina del lavoro》2019,110(2):115
Background:Workplace hazards are a significant source of health impairment for workers and of financial losses for firms. EU directives on workers’ health and safety standards significantly contributed to reduce reported occupational injuries, yet the incidence and prevalence of work-related mental illness is still very high.Objectives:We investigated the association between work-related hazards and individuals’ perceived mental health. We reviewed the existing evidence on the channels through which task-related factors, adverse agents and psychosocial factors are expected to affect workers’ health, with specific regard to mental health.Methods:We used data from the fifth wave of the European Working Conditions Survey, covering over 40,000 face-to-face interviews with workers in 34 countries, which includes information on socio-demographic characteristics, firms and jobs attributes, employment status, as well as working conditions and health status. We carried out an empirical analysis with multivariate regression models in order to estimate the relationship between workers’ mental health problems and workplace risk factors.Results:21,020 interviews were used in the multivariate analysis. We found strong correlations between hazards and various indicators of mental health. Among hazardous agents, low temperatures (β=0.0287) and contact with infectious materials (β=0.0394) were positively associated with mental health outcomes. Among task/sequence-related factors, tiring or painful positions (β=0.0713), repetitive hand/arm movements (β=0.0255), working with VDUs (β=0.0301), repetitive tasks <10 min (β=0.0859) and working in evenings (β=0.00754) were positively associated with mental health. Various psychosocial risk factors related to both the content of the job (for example, frequent disruptive interruptions: β=0.219, working in free time: β=0.0759, poor work-life balance: β=0.228) as well as the job context (for example, bad employment prospects: β=0.177, low decisional autonomy: β=0.245, bad social relations: β=0.186, workplace violence: β=0.411) were positively associated with mental health. The main results of the decomposition show that an important contribution to workers’ overall mental distress at work is associated with psychosocial risk factors (up to 60% for depression/anxiety symptoms and sleep disorders), while the contribution of somatic factors is on average lower (up to 20% for overall fatigue).Conclusions:We argue that action is needed to improve workers’ mental well-being, and reduce the economic costs for both the national health system and employers. Regulations and traditional economic measures are unlikely to prove successful in providing adequate standards of primary and secondary preventive measures in the work place without an appropriate and reliable Risk Assessment Procedure.Key words: Work hazards, risk assessment, job content, mental health 相似文献
23.
24.
25.
26.
27.
28.
Marta López-Fauqued Laura Campora Frédérique Delannois Mohamed El Idrissi Lidia Oostvogels Ferdinandus J. De Looze Javier Diez-Domingo Thomas C. Heineman Himal Lal Janet E. McElhaney Shelly A. McNeil Wilfred Yeo Fernanda Tavares-Da-Silva 《Vaccine》2019,37(18):2482-2493
Background
The ZOE-50 (NCT01165177) and ZOE-70 (NCT01165229) phase 3 clinical trials showed that the adjuvanted recombinant zoster vaccine (RZV) was ≥90% efficacious in preventing herpes zoster in adults. Here we present a comprehensive overview of the safety data from these studies.Methods
Adults aged ≥50 (ZOE-50) and ≥70 (ZOE-70) years were randomly vaccinated with RZV or placebo. Safety analyses were performed on the pooled total vaccinated cohort, consisting of participants receiving at least one dose of RZV or placebo. Solicited and unsolicited adverse events (AEs) were collected for 7 and 30?days after each vaccination, respectively. Serious AEs (SAEs) were collected from the first vaccination until 12?months post-last dose. Fatal AEs, vaccination-related SAEs, and potential immune-mediated diseases (pIMDs) were collected during the entire study period.Results
Safety was evaluated in 14,645 RZV and 14,660 placebo recipients. More RZV than placebo recipients reported unsolicited AEs (50.5% versus 32.0%); the difference was driven by transient injection site and solicited systemic reactions that were generally seen in the first week post-vaccination. The occurrence of overall SAEs (RZV: 10.1%; Placebo: 10.4%), fatal AEs (RZV: 4.3%; Placebo: 4.6%), and pIMDs (RZV: 1.2%; Placebo: 1.4%) was balanced between groups. The occurrence of possible exacerbations of pIMDs was rare and similar between groups. Overall, except for the expected local and systemic symptoms, the safety results were comparable between the RZV and Placebo groups irrespective of participant age, gender, or race.Conclusions
No safety concerns arose, supporting the favorable benefit-risk profile of RZV. 相似文献29.