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   2376379篇
  免费   177228篇
  国内免费   3417篇
耳鼻咽喉   32533篇
儿科学   76761篇
妇产科学   63279篇
基础医学   351827篇
口腔科学   64406篇
临床医学   214368篇
内科学   463802篇
皮肤病学   52067篇
神经病学   188068篇
特种医学   89155篇
外国民族医学   489篇
外科学   358406篇
综合类   48154篇
现状与发展   12篇
一般理论   932篇
预防医学   185231篇
眼科学   54959篇
药学   177033篇
  12篇
中国医学   4594篇
肿瘤学   130936篇
  2021年   19430篇
  2019年   19980篇
  2018年   27582篇
  2017年   20793篇
  2016年   23157篇
  2015年   26103篇
  2014年   36855篇
  2013年   55150篇
  2012年   76387篇
  2011年   81139篇
  2010年   48014篇
  2009年   45496篇
  2008年   76245篇
  2007年   81207篇
  2006年   82151篇
  2005年   79563篇
  2004年   76092篇
  2003年   73400篇
  2002年   70983篇
  2001年   109210篇
  2000年   111927篇
  1999年   93970篇
  1998年   27416篇
  1997年   23990篇
  1996年   24377篇
  1995年   22994篇
  1994年   21142篇
  1993年   19932篇
  1992年   72391篇
  1991年   70407篇
  1990年   68725篇
  1989年   65982篇
  1988年   60622篇
  1987年   59428篇
  1986年   55558篇
  1985年   53296篇
  1984年   39566篇
  1983年   33665篇
  1982年   20120篇
  1979年   36123篇
  1978年   25849篇
  1977年   21414篇
  1976年   20480篇
  1975年   21965篇
  1974年   26311篇
  1973年   24984篇
  1972年   23340篇
  1971年   22157篇
  1970年   20363篇
  1969年   19421篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
42.
43.
44.
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   
45.
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   
46.
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   
47.
48.
49.
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   
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