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   2583555篇
  免费   216536篇
  国内免费   17969篇
耳鼻咽喉   36232篇
儿科学   75471篇
妇产科学   67249篇
基础医学   359229篇
口腔科学   71254篇
临床医学   243468篇
内科学   500890篇
皮肤病学   50375篇
神经病学   212449篇
特种医学   103580篇
外国民族医学   982篇
外科学   383275篇
综合类   89084篇
现状与发展   49篇
一般理论   1019篇
预防医学   203530篇
眼科学   61533篇
药学   199445篇
  163篇
中国医学   15038篇
肿瘤学   143745篇
  2021年   26965篇
  2019年   24323篇
  2018年   31642篇
  2017年   25312篇
  2016年   26744篇
  2015年   32752篇
  2014年   45439篇
  2013年   61875篇
  2012年   85025篇
  2011年   90186篇
  2010年   53484篇
  2009年   49565篇
  2008年   80372篇
  2007年   84806篇
  2006年   85348篇
  2005年   83609篇
  2004年   77177篇
  2003年   73983篇
  2002年   72259篇
  2001年   116636篇
  2000年   120956篇
  1999年   103368篇
  1998年   31127篇
  1997年   28906篇
  1996年   28003篇
  1995年   27000篇
  1994年   25223篇
  1993年   22932篇
  1992年   81046篇
  1991年   77860篇
  1990年   74806篇
  1989年   71893篇
  1988年   66755篇
  1987年   65628篇
  1986年   62001篇
  1985年   58911篇
  1984年   44549篇
  1983年   37918篇
  1982年   23031篇
  1979年   41400篇
  1978年   29007篇
  1977年   24310篇
  1976年   22817篇
  1975年   23962篇
  1974年   29665篇
  1973年   28078篇
  1972年   26254篇
  1971年   24191篇
  1970年   22769篇
  1969年   21088篇
排序方式: 共有10000条查询结果,搜索用时 421 毫秒
61.
62.
63.
64.
65.
66.
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   
67.
68.
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   
69.
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   
70.
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