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   3155374篇
  免费   235557篇
  国内免费   4748篇
耳鼻咽喉   44850篇
儿科学   105005篇
妇产科学   85905篇
基础医学   459117篇
口腔科学   86776篇
临床医学   284201篇
内科学   611705篇
皮肤病学   69656篇
神经病学   249592篇
特种医学   120023篇
外国民族医学   1096篇
外科学   477707篇
综合类   67359篇
现状与发展   12篇
一般理论   1118篇
预防医学   246872篇
眼科学   74024篇
药学   235455篇
  12篇
中国医学   6134篇
肿瘤学   169060篇
  2019年   24999篇
  2018年   34803篇
  2017年   26159篇
  2016年   29292篇
  2015年   33038篇
  2014年   46552篇
  2013年   70318篇
  2012年   96828篇
  2011年   103061篇
  2010年   61484篇
  2009年   58173篇
  2008年   97128篇
  2007年   103779篇
  2006年   104691篇
  2005年   101441篇
  2004年   97710篇
  2003年   94275篇
  2002年   91770篇
  2001年   144761篇
  2000年   149004篇
  1999年   126088篇
  1998年   36522篇
  1997年   32179篇
  1996年   32566篇
  1995年   30892篇
  1994年   28721篇
  1993年   26842篇
  1992年   98549篇
  1991年   96560篇
  1990年   94001篇
  1989年   90224篇
  1988年   83040篇
  1987年   81830篇
  1986年   76479篇
  1985年   73601篇
  1984年   55017篇
  1983年   46716篇
  1982年   27728篇
  1981年   24979篇
  1979年   50373篇
  1978年   35732篇
  1977年   30016篇
  1976年   28485篇
  1975年   30775篇
  1974年   36494篇
  1973年   34928篇
  1972年   32576篇
  1971年   30486篇
  1970年   28422篇
  1969年   26749篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
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   
72.
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   
73.
74.
75.
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   
76.
77.
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   
78.
79.
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   
80.
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