首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   16985篇
  免费   1461篇
  国内免费   201篇
耳鼻咽喉   39篇
儿科学   340篇
妇产科学   765篇
基础医学   1912篇
口腔科学   113篇
临床医学   1403篇
内科学   2071篇
皮肤病学   582篇
神经病学   1302篇
特种医学   280篇
外国民族医学   2篇
外科学   1130篇
综合类   1703篇
现状与发展   1篇
一般理论   5篇
预防医学   5288篇
眼科学   64篇
药学   947篇
  3篇
中国医学   313篇
肿瘤学   384篇
  2024年   17篇
  2023年   297篇
  2022年   375篇
  2021年   735篇
  2020年   742篇
  2019年   699篇
  2018年   665篇
  2017年   683篇
  2016年   681篇
  2015年   534篇
  2014年   971篇
  2013年   1524篇
  2012年   923篇
  2011年   1001篇
  2010年   801篇
  2009年   785篇
  2008年   748篇
  2007年   742篇
  2006年   645篇
  2005年   512篇
  2004年   495篇
  2003年   404篇
  2002年   350篇
  2001年   327篇
  2000年   257篇
  1999年   221篇
  1998年   205篇
  1997年   223篇
  1996年   163篇
  1995年   167篇
  1994年   179篇
  1993年   157篇
  1992年   137篇
  1991年   113篇
  1990年   98篇
  1989年   96篇
  1988年   94篇
  1987年   85篇
  1986年   93篇
  1985年   91篇
  1984年   103篇
  1983年   38篇
  1982年   64篇
  1981年   80篇
  1980年   83篇
  1979年   51篇
  1978年   44篇
  1977年   44篇
  1976年   39篇
  1975年   24篇
排序方式: 共有10000条查询结果,搜索用时 531 毫秒
1.
2.
3.
This paper describes country-wide special measures undertaken for interventional radiology staff during the current coronavirus disease 2019 (COVID-19) pandemic. Although each interventional radiology service around the world faces unique challenges, the principles outlined in this article will be useful when designing or strengthening individual practices and integrating them within wider hospital and national measures. Moving beyond the current outbreak, these measures will be useful for any future infectious diseases which are likely to arise.  相似文献   
4.
5.
ABSTRACT

HIV-positive men who have sex with men (HIV+MSM) in India need culturally-relevant interventions to promote safer sex. We tested a multi-level intervention among HIV+MSM that targeted individual, interpersonal, and community factors, based on the Social-Personal and Social Ecological Models. We conducted a 2?×?2 factorial RCT with 119 HIV+MSM randomised to receive either an individual-level intervention (ILI) using motivational interviewing to promote safer sex, a community-level intervention (CLI) to strengthen community norms toward safer sex and reduce stigma among MSM communities, a multi-level intervention combining the individual- and community-level interventions (ILI?+?CLI), or standard-of-care control. Participants completed pre- and post-intervention assessments of a composite sexual risk score and a process evaluation to assess fidelity and satisfaction. Out of the 119 HIV+MSM, 106 (89.0%) completed pre- and post-intervention assessments. Generalised Estimating Equation models showed that both CLI (Incidence Rate Ratio [IRR]?=?.67, 95% CI .47 to .96) and ILI?+?CLI (IRR?=?.66, 95% CI .48 to .91) groups had a statistically significant decrease in sexual risk compared to the standard-of-care. The interventions had high levels of fidelity and satisfaction. This pilot RCT demonstrated feasibility and potential effectiveness of a multi-level intervention that addresses individual, interpersonal and community-level contributors of sexual risk among HIV+MSM.  相似文献   
6.
7.
目的探讨女性难治性膀胱过度活动症患者心理弹性状况及保护性因素,为改善其身心健康提供依据。方法采用心理弹性量表、症状自评量表、艾森克人格问卷、社会支持量表、焦虑及抑郁量表对80例女性难治性膀胱过度活动症患者进行问卷调查。结果女性难治性膀胱过度活动症患者心理弹性得分为(54.10±8.27)分,显著低于国内常模(P<0.05)。患者的一般情况(病程、年龄、文化程度)对心理弹性的预测作用不明显(R2=0.14,F=18.10),当社会支持、SCL-90、人格特质、SAS、SDS进入方程后,对患者的心理弹性具有较明显的预测作用(R2=0.67,△R2=0.46,F=115.22)。结论女性难治性膀胱过度活动症患者心理弹性较差,社会支持、SCL-90、人格特质、焦虑抑郁情绪是其重要的影响因素,应重视患者存在的心理问题,发掘心理弹性的保护性因素并积极干预,促进其身心健康。  相似文献   
8.
9.
In the USA, the Black Church is among the most important institutions in the Black community, offering numerous spiritual, social and health benefits. Yet, the presence of homonegativity in many Black Churches may mitigate those effects for gay Black youth. This research examines the role of the Church in the lives of gay and bisexual Black youth to understand how they reconcile any tension between their religious and sexual identities. Through interviews with pastors of Black churches (n = 21) and young Black men who have sex with men (n = 30), we explored homonegativity and young men’s experiences within the Black Church. Findings reveal that despite the prevalence of homonegativity within Black churches, religious involvement remains important for young men and many remain involved in non-affirming churches. The importance of the Church for young men stems from their significant involvement as youth and the integration of religion, family and community. Young men may not be able to leave their religious homes as readily as other gay youth given the cultural relevance of the Church. As a result, young men made attempts to conceal their sexuality in church to avoid shame and gossip and find opportunities to balance their sexuality and religiosity.  相似文献   
10.
《Vaccine》2019,37(43):6255-6261
Health workers represent an important target group for seasonal influenza vaccination because of their increased risk of infection as well as the risk of transmitting infection to vulnerable patients in the health care setting. Moreover, seasonal vaccination of health workers contributes to pandemic preparedness. However, many countries, especially in Africa and Asia, do not have policies for health worker influenza vaccination. In countries where such policies exist, vaccination coverage is often low. The World Health Organization (WHO) is developing a manual to guide the introduction of seasonal influenza vaccination of health workers. An Independent External Advisory Group (IEAG) that is advising WHO on the content of the manual met to discuss issues that are relevant and often unique to health worker vaccination. This meeting report summarizes the main issues that were discussed and the outcomes of the discussion. The issues include policy considerations, including the evidence in support of health worker vaccination; categorization and prioritization of health workers; the choice of vaccination strategy; its integration into broader health worker vaccination and occupational health policies; planning and management of vaccination, particularly the approaches for communication and demand generation; and the challenges with monitoring and evaluation of health worker vaccination, especially in low and middle-income countries.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号