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   4224392篇
  免费   318199篇
  国内免费   10105篇
耳鼻咽喉   58563篇
儿科学   140234篇
妇产科学   118291篇
基础医学   593745篇
口腔科学   121953篇
临床医学   388775篇
内科学   814928篇
皮肤病学   97631篇
神经病学   346888篇
特种医学   162465篇
外国民族医学   1477篇
外科学   631529篇
综合类   98220篇
现状与发展   8篇
一般理论   1725篇
预防医学   335338篇
眼科学   98589篇
药学   310565篇
  9篇
中国医学   8526篇
肿瘤学   223237篇
  2018年   45215篇
  2017年   34821篇
  2016年   39889篇
  2015年   45211篇
  2014年   62966篇
  2013年   95619篇
  2012年   127507篇
  2011年   135333篇
  2010年   81206篇
  2009年   77224篇
  2008年   126546篇
  2007年   134253篇
  2006年   136285篇
  2005年   131782篇
  2004年   127151篇
  2003年   122387篇
  2002年   118560篇
  2001年   194447篇
  2000年   199882篇
  1999年   169028篇
  1998年   49904篇
  1997年   44344篇
  1996年   44033篇
  1995年   42533篇
  1994年   39200篇
  1993年   36936篇
  1992年   133661篇
  1991年   129494篇
  1990年   125817篇
  1989年   121626篇
  1988年   112403篇
  1987年   110353篇
  1986年   104373篇
  1985年   100168篇
  1984年   75552篇
  1983年   64562篇
  1982年   38651篇
  1981年   34679篇
  1979年   69354篇
  1978年   48929篇
  1977年   41508篇
  1976年   38841篇
  1975年   41143篇
  1974年   49535篇
  1973年   47509篇
  1972年   44582篇
  1971年   41572篇
  1970年   38642篇
  1969年   36748篇
  1968年   33854篇
排序方式: 共有10000条查询结果,搜索用时 546 毫秒
101.
102.
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   
103.
104.
Sorsby fundus dystrophy (SFD), an autosomal dominant, fully penetrant, degenerative disease of the macula, is manifested by symptoms of night blindness or sudden loss of visual acuity, usually in the third to fourth decades of life due to choroidal neovascularization (CNV). SFD is caused by specific mutations in the Tissue Inhibitor of Metalloproteinase-3, (TIMP3) gene. The predominant histo-pathological feature in the eyes of patients with SFD are confluent 20–30 m thick, amorphous deposits found between the basement membrane of the retinal pigment epithelium (RPE) and the inner collagenous layer of Bruch's membrane. SFD is a rare disease but it has generated significant interest because it closely resembles the exudative or “wet” form of the more common age-related macular degeneration (AMD). In addition, in both SFD and AMD donor eyes, sub-retinal deposits have been shown to accumulate TIMP3 protein. Understanding the molecular functions of wild-type and mutant TIMP3 will provide significant insights into the patho-physiology of SFD and perhaps AMD. This review summarizes the current knowledge on TIMP3 and how mutations in TIMP3 cause SFD to provide insights into how we can study this disease going forward. Findings from these studies could have potential therapeutic implications for both SFD and AMD.  相似文献   
105.
106.
107.
108.
109.
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   
110.
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