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   2399042篇
  免费   200874篇
  国内免费   4282篇
耳鼻咽喉   34497篇
儿科学   73476篇
妇产科学   63596篇
基础医学   338825篇
口腔科学   68186篇
临床医学   219326篇
内科学   473215篇
皮肤病学   48227篇
神经病学   203458篇
特种医学   96965篇
外国民族医学   943篇
外科学   363794篇
综合类   56747篇
现状与发展   1篇
一般理论   1016篇
预防医学   194119篇
眼科学   56193篇
药学   179525篇
  4篇
中国医学   4379篇
肿瘤学   127706篇
  2018年   24674篇
  2016年   20984篇
  2015年   23673篇
  2014年   34166篇
  2013年   51831篇
  2012年   70051篇
  2011年   73620篇
  2010年   43315篇
  2009年   41575篇
  2008年   70063篇
  2007年   74403篇
  2006年   75299篇
  2005年   73319篇
  2004年   70614篇
  2003年   68168篇
  2002年   67375篇
  2001年   113151篇
  2000年   117232篇
  1999年   98966篇
  1998年   28223篇
  1997年   25807篇
  1996年   25719篇
  1995年   24894篇
  1994年   23405篇
  1993年   21777篇
  1992年   79874篇
  1991年   76922篇
  1990年   74040篇
  1989年   71323篇
  1988年   66341篇
  1987年   65203篇
  1986年   61739篇
  1985年   58802篇
  1984年   44570篇
  1983年   37967篇
  1982年   23083篇
  1981年   20545篇
  1980年   19248篇
  1979年   41632篇
  1978年   29255篇
  1977年   24553篇
  1976年   23062篇
  1975年   24160篇
  1974年   29884篇
  1973年   28298篇
  1972年   26457篇
  1971年   24363篇
  1970年   22942篇
  1969年   21258篇
  1968年   19340篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
42.
43.
44.
45.
46.
47.
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   
48.
49.
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   
50.
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   
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