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   3182993篇
  免费   237751篇
  国内免费   5634篇
耳鼻咽喉   45091篇
儿科学   105601篇
妇产科学   86574篇
基础医学   462149篇
口腔科学   87352篇
临床医学   286890篇
内科学   617676篇
皮肤病学   70122篇
神经病学   251961篇
特种医学   121012篇
外国民族医学   1098篇
外科学   481353篇
综合类   69352篇
现状与发展   13篇
一般理论   1119篇
预防医学   248287篇
眼科学   74400篇
药学   238051篇
  19篇
中国医学   7057篇
肿瘤学   171201篇
  2021年   25302篇
  2019年   25889篇
  2018年   35787篇
  2017年   26975篇
  2016年   30170篇
  2015年   34177篇
  2014年   47995篇
  2013年   72006篇
  2012年   99077篇
  2011年   105302篇
  2010年   62810篇
  2009年   59426篇
  2008年   98971篇
  2007年   105504篇
  2006年   106279篇
  2005年   102949篇
  2004年   99020篇
  2003年   95385篇
  2002年   92756篇
  2001年   145201篇
  2000年   149411篇
  1999年   126477篇
  1998年   36758篇
  1997年   32379篇
  1996年   32751篇
  1995年   31038篇
  1994年   28864篇
  1993年   26943篇
  1992年   98727篇
  1991年   96737篇
  1990年   94199篇
  1989年   90391篇
  1988年   83186篇
  1987年   81959篇
  1986年   76607篇
  1985年   73706篇
  1984年   55112篇
  1983年   46798篇
  1982年   27773篇
  1979年   50454篇
  1978年   35785篇
  1977年   30058篇
  1976年   28520篇
  1975年   30803篇
  1974年   36545篇
  1973年   34983篇
  1972年   32632篇
  1971年   30538篇
  1970年   28465篇
  1969年   26794篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
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   
82.
83.
84.
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   
85.
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   
86.
87.
88.
Acne vulgaris (acne) is a chronic inflammatory disease of the sebaceous gland, characterized by follicular hyperkeratinization, excessive colonization by Propionibacterium acnes (Pacnes) as well as immune reactions and inflammation. Despite an armamentarium of topical treatments available including benzoyl peroxide, retinoids and azelaic acid, topical antibiotics in monotherapies, especially erythromycin and clindamycin, are still used in Europe to treat acne. This intensive use led to antimicrobial‐resistant P. acnes and staphylococci strains becoming one of the main health issues worldwide. This is an update on the current topical acne treatments available in Europe, their mechanism of action, their potential to induce antimicrobial resistance and their clinical efficacy and safety.  相似文献   
89.
90.
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   
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