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   1462950篇
  免费   108041篇
  国内免费   2472篇
耳鼻咽喉   20820篇
儿科学   49802篇
妇产科学   39763篇
基础医学   209116篇
口腔科学   40011篇
临床医学   123342篇
内科学   299349篇
皮肤病学   33620篇
神经病学   115792篇
特种医学   55761篇
外国民族医学   687篇
外科学   218124篇
综合类   28014篇
现状与发展   1篇
一般理论   409篇
预防医学   116264篇
眼科学   32440篇
药学   108809篇
  2篇
中国医学   3133篇
肿瘤学   78204篇
  2021年   11720篇
  2019年   12773篇
  2018年   18389篇
  2017年   13320篇
  2016年   14405篇
  2015年   16181篇
  2014年   22070篇
  2013年   33397篇
  2012年   47339篇
  2011年   49742篇
  2010年   29047篇
  2009年   27006篇
  2008年   46280篇
  2007年   49419篇
  2006年   49359篇
  2005年   48011篇
  2004年   46316篇
  2003年   44590篇
  2002年   43632篇
  2001年   68863篇
  2000年   71720篇
  1999年   60693篇
  1998年   16374篇
  1997年   14627篇
  1996年   15015篇
  1995年   14160篇
  1994年   13360篇
  1993年   12328篇
  1992年   46942篇
  1991年   45728篇
  1990年   44361篇
  1989年   42043篇
  1988年   38661篇
  1987年   37895篇
  1986年   35314篇
  1985年   33905篇
  1984年   25345篇
  1983年   21317篇
  1982年   12345篇
  1979年   22639篇
  1978年   15715篇
  1977年   13379篇
  1976年   12508篇
  1975年   13620篇
  1974年   15911篇
  1973年   15379篇
  1972年   14137篇
  1971年   12884篇
  1970年   12152篇
  1969年   11187篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
62.
Haemophilia is a common cause of genetically inherited bleeding disorders. Pseudotumours occur in 1–2 % of persons with severe forms of haemophilia. These are a result of repeated haemorrhage into soft tissues, subperiosteum or a site of bone fracture with inadequate resorption of the extravasated blood. There are a number of therapeutic alternatives for this dangerous condition: surgical removal, percutaneous management, irradiation, embolization etc. In this case report, we describe the natural history, clinical course and successful surgical management of a patient with haemophilia who presented with a massive pseudotumour. We also briefly review the relevant literature on the various therapeutic modalities that have been implemented in the management of this rare complication. Though surgeons may be averse to operate on haemophiliacs, primary surgical management as done in our case may prove to be the definitive treatment option for such patients.  相似文献   
63.
64.
As millions of people turn to social media for health information, better understanding the factors that guide health-related judgments and perceptions in this context is imperative. We report on two Web experiments (n > 400 total) examining the power of society’s widespread weight bias and related stereotypes to influence nutrition judgments in social media spaces. In Experiment 1, meals were judged as lower in nutritional quality when the person who recommended them (the source) was depicted as obese rather than of normal weight, an effect mediated by stereotypic beliefs about the source as a generally unhealthy person. Experiment 2 replicated this effect, which—notably—remained significant when controlling for objective nutritional information (calories and fat content). Results highlight spillover effects of weight bias that extend beyond person perception to color impressions of objects (here, food) that are associated with stigmatized attributes. Implications for everyday nutrition judgments and public health are considered.  相似文献   
65.
66.
67.
68.
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   
69.
70.
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