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   943967篇
  免费   68846篇
  国内免费   1358篇
耳鼻咽喉   13092篇
儿科学   24784篇
妇产科学   23490篇
基础医学   134692篇
口腔科学   28673篇
临床医学   82167篇
内科学   185934篇
皮肤病学   19396篇
神经病学   73457篇
特种医学   37197篇
外国民族医学   82篇
外科学   153617篇
综合类   18366篇
现状与发展   1篇
一般理论   246篇
预防医学   63187篇
眼科学   21591篇
药学   73554篇
  3篇
中国医学   2164篇
肿瘤学   58478篇
  2018年   9168篇
  2017年   7193篇
  2016年   7943篇
  2015年   9058篇
  2014年   12278篇
  2013年   17887篇
  2012年   24735篇
  2011年   25660篇
  2010年   15168篇
  2009年   14565篇
  2008年   25197篇
  2007年   26296篇
  2006年   27079篇
  2005年   26021篇
  2004年   25171篇
  2003年   24188篇
  2002年   23645篇
  2001年   55195篇
  2000年   57004篇
  1999年   47361篇
  1998年   10919篇
  1997年   9608篇
  1996年   9739篇
  1995年   9097篇
  1994年   8417篇
  1993年   7735篇
  1992年   35850篇
  1991年   34244篇
  1990年   33065篇
  1989年   32194篇
  1988年   29263篇
  1987年   28528篇
  1986年   26512篇
  1985年   25368篇
  1984年   18003篇
  1983年   15313篇
  1982年   7926篇
  1981年   6885篇
  1979年   15951篇
  1978年   10725篇
  1977年   9169篇
  1976年   8000篇
  1975年   8731篇
  1974年   10588篇
  1973年   9992篇
  1972年   9476篇
  1971年   8950篇
  1970年   8542篇
  1969年   8007篇
  1968年   7268篇
排序方式: 共有10000条查询结果,搜索用时 468 毫秒
21.
Background: Poor anger regulation is considered a risk factor of aggression in individuals with mild or borderline intellectual disabilities. Psychomotor therapy (PMT) targets anger regulation through body- and movement-oriented interventions. This study aims to inform practitioners on efficacy and research-base of PMT in this population.

Method: This systematic review evaluated nine studies which met inclusion criteria in terms of participants, intervention procedures, outcomes and certainty of evidence.

Results: Seven studies revealed a substantial reduction of aggressive behaviour or anger. Certainty of evidence was rated inconclusive in most cases due to absence of experimental control.

Conclusions: We can conclude that body-oriented PMT, involving progressive relaxation and meditation procedure “Soles of the Feet”, is a promising approach. However, the paucity of studies and methodological limitations preclude classifying it as an evidence-based practice. This suggests stronger methodological research and research aimed at PMT’s mechanisms of action (e.g., improved interoceptive awareness) is warranted.  相似文献   

22.
Purpose: To review the systemic and ocular manifestations of specific emergent viral infectious diseases relevant to the ophthalmologist with particular emphasis on anterior uveitis

Methods: Review of literature.

Results: Arboviral diseases are among the most important emergent and resurgent human infections, occurring mostly in tropical and subtropical zones, but appearing in virtually all regions of the world as a result of climate change, travel, and globalization. Arboviral infections are transmitted to humans by the bite of hematophagous arthropods, mainly mosquitoes. Systemic disease may range from asymptomatic to life-threatening. A wide variety of ocular manifestations, including uveitis, has been reported in association with these emerging viral diseases. Numerous viruses other than arboviruses also have been recently recognized as a potential cause of uveitis.

Conclusions: Proper clinical diagnosis of any emerging infectious disease is based on epidemiological data, history, systemic symptoms and signs, and the pattern of ocular involvement. The diagnosis is usually confirmed by detection of virus-specific DNA or antivirus antibodies in serum.  相似文献   
23.
24.
25.
26.
27.
28.
29.
30.
Preimplantation genetic diagnosis (PGD) was originally developed to diagnose embryo-related genetic abnormalities for couples who present a high risk of a specific inherited disorder. Because this technology involves embryo selection, the medical, bioethical, and legal implications of the technique have been debated, particularly when it is used to select features that are not related to serious diseases. Although several initiatives have attempted to achieve regulatory harmonization, the diversity of healthcare services available and the presence of cultural differences have hampered attempts to achieve this goal. Thus, in different countries, the provision of PGD and regulatory frameworks reflect the perceptions of scientific groups, legislators, and society regarding this technology. In Brazil, several texts have been analyzed by the National Congress to regulate the use of assisted reproduction technologies. Legislative debates, however, are not conclusive, and limited information has been published on how PGD is specifically regulated. The country requires the development of new regulatory standards to ensure adequate access to this technology and to guarantee its safe practice. This study examined official documents published on PGD regulation in Brazil and demonstrated how little direct oversight of PGD currently exists. It provides relevant information to encourage reflection on a particular regulation model in a Brazilian context, and should serve as part of the basis to enable further reform of the clinical practice of PGD in the country.  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