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   930929篇
  免费   67601篇
  国内免费   1338篇
耳鼻咽喉   12959篇
儿科学   24361篇
妇产科学   23237篇
基础医学   132953篇
口腔科学   28253篇
临床医学   80572篇
内科学   183312篇
皮肤病学   19232篇
神经病学   72224篇
特种医学   36812篇
外国民族医学   79篇
外科学   152157篇
综合类   18045篇
现状与发展   1篇
一般理论   235篇
预防医学   61768篇
眼科学   21310篇
药学   72537篇
  3篇
中国医学   2162篇
肿瘤学   57656篇
  2018年   8969篇
  2017年   7038篇
  2016年   7760篇
  2015年   8868篇
  2014年   11990篇
  2013年   17510篇
  2012年   24113篇
  2011年   25073篇
  2010年   14819篇
  2009年   14283篇
  2008年   24630篇
  2007年   25708篇
  2006年   26491篇
  2005年   25433篇
  2004年   24565篇
  2003年   23610篇
  2002年   23149篇
  2001年   54736篇
  2000年   56547篇
  1999年   46953篇
  1998年   10738篇
  1997年   9466篇
  1996年   9598篇
  1995年   8929篇
  1994年   8281篇
  1993年   7595篇
  1992年   35495篇
  1991年   33918篇
  1990年   32736篇
  1989年   31875篇
  1988年   28995篇
  1987年   28253篇
  1986年   26294篇
  1985年   25151篇
  1984年   17835篇
  1983年   15142篇
  1982年   7798篇
  1981年   6775篇
  1979年   15784篇
  1978年   10600篇
  1977年   9053篇
  1976年   7872篇
  1975年   8631篇
  1974年   10470篇
  1973年   9862篇
  1972年   9360篇
  1971年   8853篇
  1970年   8427篇
  1969年   7925篇
  1968年   7202篇
排序方式: 共有10000条查询结果,搜索用时 692 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