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   98799篇
  免费   7821篇
  国内免费   1481篇
耳鼻咽喉   477篇
儿科学   824篇
妇产科学   563篇
基础医学   2649篇
口腔科学   929篇
临床医学   47469篇
内科学   10223篇
皮肤病学   269篇
神经病学   3653篇
特种医学   1258篇
外国民族医学   6篇
外科学   5257篇
综合类   12435篇
一般理论   3篇
预防医学   10622篇
眼科学   279篇
药学   5963篇
  473篇
中国医学   3413篇
肿瘤学   1336篇
  2024年   384篇
  2023年   2356篇
  2022年   3519篇
  2021年   4927篇
  2020年   5579篇
  2019年   3996篇
  2018年   3537篇
  2017年   4168篇
  2016年   4498篇
  2015年   4275篇
  2014年   9142篇
  2013年   8910篇
  2012年   7483篇
  2011年   7517篇
  2010年   5863篇
  2009年   5169篇
  2008年   4576篇
  2007年   4643篇
  2006年   3839篇
  2005年   3161篇
  2004年   2323篇
  2003年   1691篇
  2002年   1325篇
  2001年   1175篇
  2000年   916篇
  1999年   713篇
  1998年   556篇
  1997年   427篇
  1996年   323篇
  1995年   226篇
  1994年   168篇
  1993年   133篇
  1992年   142篇
  1991年   96篇
  1990年   72篇
  1989年   37篇
  1988年   50篇
  1987年   36篇
  1986年   24篇
  1985年   20篇
  1984年   12篇
  1983年   12篇
  1982年   22篇
  1981年   12篇
  1980年   9篇
  1979年   8篇
  1978年   7篇
  1977年   6篇
  1976年   6篇
  1971年   4篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
42.
43.
Past research suggests that as many as 50% of onward human immunodeficiency virus (HIV) transmissions occur during acute and recent HIV infection. It is clearly important to develop interventions which focus on this highly infectious stage of HIV infection to prevent further transmission in the risk networks of acutely and recently infected individuals. Project Protect tries to find recently and acutely infected individuals and prevents HIV transmission in their risk networks. Participants are recruited by community health outreach workers at community-based HIV testing sites and drug users' community venues, by coupon referrals and through referrals from AIDS clinics. When a network with acute/recent infection is identified, network members are interviewed about their risky behaviors, network information is collected, and blood is drawn for HIV testing. Participants are also educated and given prevention materials (condoms, syringes, educational materials); HIV-infected participants are referred to AIDS clinics and are assisted with access to care. Community alerts about elevated risk of HIV transmission are distributed within the risk networks of recently infected. Overall, 342 people were recruited to the project and screened for acute/recent HIV infection. Only six index cases of recent infection (2.3% of all people screened) were found through primary screening at voluntary counseling and testing (VCT) sites, but six cases of recent infection were found through contact tracing of these recently infected participants (7% of network members who came to the interview). Combining screening at VCT sites and contact tracing the number of recently infected people we located as compared to VCT screening alone. No adverse events were encountered. These first results provide evidence for the theory behind the intervention, i.e., in the risk networks of recently infected people there are other people with recent HIV infection and they can be successfully located without increasing stigma for project participants.  相似文献   
44.
45.
46.
47.
48.
目的本文主要研究和探讨护理干预对放疗科头颈部肿瘤放疗患者生活质量的影响。方法将我院2017年2月份至2018年10月份收治的100例头颈部肿瘤放疗患者作为本次研究的对象,在随机原则的指导下把100例患者分为对照组和实验组,每组患者的数量为50例。对照组患者给予常规护理,实验组患者实施护理干预,对两组患者的生活质量、睡眠质量、护理满意度和护理依从性等进行对比分析。结果在生活质量、睡眠质量、护理满意度和护理依从性等方面,组间进行对比分析,实验组都明显优于对照组,P<0.05差异具有统计学意义。结论对头颈部肿瘤放疗患者实施护理干预可以让患者的生活质量、睡眠质量、护理依从性以及护理满意度等都得到显著的改善,从而让患者以一种积极、乐观的心态接受放疗,这对于放疗效果的提高具有重要的作用。总之,这一护理模式应该在临床中进行推广和使用。  相似文献   
49.
Nursing schools strive to select a diverse student population who are likely to succeed by ensuring timely student progression through the program and effective use of educational sources. The purpose of this systematic literature review is to explore the preadmission variables and selection criteria that predict student success in 4-year baccalaureate nursing programs in the U.S. Sixteen articles met the eligibility criteria, and six measures were used to define student success: (a) early academic success, particularly during the first and second year; (b) attrition; (c) timely completion of the program; (d) graduation; (e) performance in nursing courses; and (f) academic performance in other science courses. Typically, the core set of cognitive predictors used in the admission process in nursing schools were pre-nursing GPA, pre-nursing collegiate science GPA, and scores on standardized aptitude exams. This review suggests that it is challenging to isolate one single variable as the best predictor of student success; however, using a combination of variables can offer a reliable prediction method. More researchers should consider using a theoretical basis to guide their inquiry on this topic. Additionally, researchers should examine admission variables that are most relevant across programs.  相似文献   
50.
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