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   3282838篇
  免费   236928篇
  国内免费   5778篇
耳鼻咽喉   47153篇
儿科学   104253篇
妇产科学   90951篇
基础医学   477777篇
口腔科学   93584篇
临床医学   292501篇
内科学   632086篇
皮肤病学   73552篇
神经病学   259705篇
特种医学   125247篇
外国民族医学   894篇
外科学   499351篇
综合类   71142篇
现状与发展   16篇
一般理论   1189篇
预防医学   248315篇
眼科学   78063篇
药学   246127篇
  15篇
中国医学   6805篇
肿瘤学   176818篇
  2018年   34494篇
  2017年   26355篇
  2016年   29483篇
  2015年   33133篇
  2014年   46750篇
  2013年   70819篇
  2012年   96106篇
  2011年   102279篇
  2010年   60925篇
  2009年   57938篇
  2008年   96753篇
  2007年   104029篇
  2006年   104873篇
  2005年   101911篇
  2004年   97911篇
  2003年   94652篇
  2002年   92086篇
  2001年   148910篇
  2000年   152797篇
  1999年   129005篇
  1998年   37135篇
  1997年   32791篇
  1996年   32451篇
  1995年   30778篇
  1994年   28470篇
  1993年   26831篇
  1992年   100515篇
  1991年   98098篇
  1990年   95961篇
  1989年   92910篇
  1988年   85925篇
  1987年   84506篇
  1986年   79860篇
  1985年   76597篇
  1984年   57043篇
  1983年   48642篇
  1982年   29103篇
  1981年   26252篇
  1979年   53442篇
  1978年   38305篇
  1977年   32492篇
  1976年   30466篇
  1975年   33623篇
  1974年   40141篇
  1973年   38532篇
  1972年   36487篇
  1971年   34435篇
  1970年   32154篇
  1969年   30730篇
  1968年   28418篇
排序方式: 共有10000条查询结果,搜索用时 16 毫秒
71.
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   
72.
73.
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   
74.
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   
75.
76.
77.
78.
We report on a child with several café au lait spots in association with a lumbar lipomeningomyelocele as an apparently new association. Cutaneous markers, the identification of which plays a crucial role in the early diagnosis and management of spinal malformations, can accompany occult spinal dysraphism. Herein we report a case of lumbar lipomeningomyelocele associated with an overlying café au lait spot that served as a marker of occult spinal dysraphism. The patient also had segmental café au lait spots on the face, making the association unique.  相似文献   
79.
80.
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   
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