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   2539261篇
  免费   186676篇
  国内免费   3615篇
耳鼻咽喉   35192篇
儿科学   82906篇
妇产科学   69576篇
基础医学   375162篇
口腔科学   68994篇
临床医学   227688篇
内科学   492644篇
皮肤病学   56042篇
神经病学   199573篇
特种医学   95808篇
外国民族医学   527篇
外科学   384216篇
综合类   52851篇
现状与发展   13篇
一般理论   967篇
预防医学   196663篇
眼科学   59258篇
药学   188602篇
  11篇
中国医学   4981篇
肿瘤学   137878篇
  2021年   20348篇
  2019年   20936篇
  2018年   29259篇
  2017年   21932篇
  2016年   24586篇
  2015年   27735篇
  2014年   38958篇
  2013年   58557篇
  2012年   80266篇
  2011年   85080篇
  2010年   50949篇
  2009年   48085篇
  2008年   79960篇
  2007年   85310篇
  2006年   86082篇
  2005年   83229篇
  2004年   79766篇
  2003年   76790篇
  2002年   74335篇
  2001年   116401篇
  2000年   119224篇
  1999年   100252篇
  1998年   28956篇
  1997年   25448篇
  1996年   25760篇
  1995年   24317篇
  1994年   22404篇
  1993年   21120篇
  1992年   77161篇
  1991年   75300篇
  1990年   73549篇
  1989年   70805篇
  1988年   65036篇
  1987年   63825篇
  1986年   59705篇
  1985年   57384篇
  1984年   42510篇
  1983年   36198篇
  1982年   21596篇
  1979年   38993篇
  1978年   27910篇
  1977年   23177篇
  1976年   22158篇
  1975年   23912篇
  1974年   28650篇
  1973年   27325篇
  1972年   25590篇
  1971年   24292篇
  1970年   22463篇
  1969年   21270篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
61.
62.
While previous randomised controlled trials and meta-analyses offer only limited evidence for the effectiveness of cognitive rehabilitation, qualitative studies examining patient perspectives report more positive outcomes. This meta-synthesis of qualitative studies examined patient perspectives of cognitive rehabilitation for memory, attention, and executive function problems in people with multiple sclerosis. Using set eligibility criteria, we screened electronic databases, reference lists, and academic networks for relevant papers. Seven papers (195 participants) were selected. Two independent researchers conducted quality appraisals of papers. Data analysis, guided by the thematic synthesis approach, yielded six main themes. These suggested that patients benefitted from the group environment in rehabilitation. Cognitive rehabilitation facilitated the participants’ reflection and awareness of their cognitive deficits, and was associated with increased knowledge and understanding of their illness. Increased strategy use was reported and associated with improvements in cognitive functioning and greater confidence and perseverance. Participants reported emotional and social improvements, and felt more optimistic. Overall, these changes had a positive impact on participants’ quality of life. This synthesis of qualitative studies indicates that people with multiple sclerosis who experience cognitive deficits benefit from cognitive rehabilitation programmes. This finding must, however, be viewed in light of the limitations of this meta-synthesis. The meta-synthesis was registered in the PROSPERO database under CRD42017040148.  相似文献   
63.
64.
We report two British cases of liver abscess, due to Klebsiella pneumoniae and associated with synchronous infection elsewhere, which required liver resection for definitive treatment. They illustrate the geographic spread of aggressive K pneumoniae liver infection and demonstrate the importance of early aggressive treatment.  相似文献   
65.
Henna, derived from a combination of natural leaves and coloring additives, is a common decorative dye traditionally used in many Islamic religious celebrations. Para‐phenylenediamine (PPD), a major component of black henna tattoo, is a strong sensitizer and common allergen. We report a case of severe connubial allergic contact dermatitis after black henna heterotransfer in a girl.  相似文献   
66.
67.
68.
69.
Dosage form is a mean used for the delivery of drug to a living body. In order to get the desired effect the drug should be delivered to its site of action at such rate and concentration to achieve the maximum therapeutic effect and minimum adverse effect. Since oral route is still widely accepted route but having a common drawback of difficulty in swallowing of tablets and capsules. Therefore a lot of research has been done on novel drug delivery systems. This review is about oral dispersible tablets a novel approach in drug delivery systems that are now a day''s more focused in formulation world, and laid a new path that, helped the patients to build their compliance level with the therapy, also reduced the cost and ease the administration especially in case of pediatrics and geriatrics. Quick absorption, rapid onset of action and reduction in drug loss properties are the basic advantages of this dosage form.  相似文献   
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