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   2377639篇
  免费   198601篇
  国内免费   4235篇
耳鼻咽喉   34356篇
儿科学   72912篇
妇产科学   63127篇
基础医学   335761篇
口腔科学   67649篇
临床医学   216031篇
内科学   469824篇
皮肤病学   48097篇
神经病学   201472篇
特种医学   96094篇
外国民族医学   886篇
外科学   361208篇
综合类   56321篇
现状与发展   1篇
一般理论   986篇
预防医学   190948篇
眼科学   55634篇
药学   178073篇
  4篇
中国医学   4381篇
肿瘤学   126710篇
  2018年   24352篇
  2016年   20721篇
  2015年   23455篇
  2014年   33776篇
  2013年   51136篇
  2012年   69185篇
  2011年   72740篇
  2010年   42701篇
  2009年   41111篇
  2008年   69162篇
  2007年   73565篇
  2006年   74415篇
  2005年   72451篇
  2004年   69761篇
  2003年   67390篇
  2002年   66633篇
  2001年   112564篇
  2000年   116636篇
  1999年   98415篇
  1998年   27933篇
  1997年   25573篇
  1996年   25496篇
  1995年   24653篇
  1994年   23209篇
  1993年   21607篇
  1992年   79461篇
  1991年   76476篇
  1990年   73644篇
  1989年   70922篇
  1988年   65919篇
  1987年   64862篇
  1986年   61401篇
  1985年   58445篇
  1984年   44284篇
  1983年   37715篇
  1982年   22942篇
  1981年   20375篇
  1980年   19078篇
  1979年   41330篇
  1978年   29019篇
  1977年   24380篇
  1976年   22861篇
  1975年   23997篇
  1974年   29658篇
  1973年   28063篇
  1972年   26250篇
  1971年   24177篇
  1970年   22771篇
  1969年   21105篇
  1968年   19153篇
排序方式: 共有10000条查询结果,搜索用时 250 毫秒
41.
42.
43.
44.
45.
46.
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   
47.
48.
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   
49.
Pediatric trachyonychia is an acquired nail disease that can cause distress to families. It is a poorly understood disease, and long‐term follow‐up data are lacking. We present an institutional review of 11 children with isolated pediatric trachyonychia followed over time. Children with the diagnosis of pediatric trachyonychia were identified and invited to participate. Pictures were taken on follow‐up and a questionnaire was answered. Exclusion criteria include having another diagnosis at the initial visit that causes nail dystrophy. Eleven patients with the diagnosis of pediatric trachyonychia were available for follow‐up. The mean age of appearance was 2.7 years (range 2–7 yrs) and the average follow‐up was 66 months (range 10–126 mos). Nine patients were treated with potent topical corticosteroids, one used only petrolatum, and one took vitamin supplements. One patient was found to have an additional skin and hair diagnosis of alopecia areata on follow‐up. On follow‐up, 82% noted improvement of the nails, whereas 18% noted no change. A majority of cases of pediatric trachyonychia are isolated and improve with time, regardless of treatment.  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