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   3186347篇
  免费   253175篇
  国内免费   5458篇
耳鼻咽喉   45425篇
儿科学   100167篇
妇产科学   86339篇
基础医学   457966篇
口腔科学   91816篇
临床医学   295372篇
内科学   616908篇
皮肤病学   66045篇
神经病学   265415篇
特种医学   124706篇
外国民族医学   1104篇
外科学   471504篇
综合类   73762篇
现状与发展   4篇
一般理论   1436篇
预防医学   262204篇
眼科学   75191篇
药学   237630篇
  10篇
中国医学   5739篇
肿瘤学   166237篇
  2018年   32904篇
  2016年   27938篇
  2015年   31757篇
  2014年   45252篇
  2013年   69143篇
  2012年   93364篇
  2011年   99065篇
  2010年   58075篇
  2009年   55662篇
  2008年   93978篇
  2007年   100220篇
  2006年   100573篇
  2005年   98216篇
  2004年   94443篇
  2003年   91050篇
  2002年   89579篇
  2001年   142990篇
  2000年   147521篇
  1999年   124973篇
  1998年   36560篇
  1997年   33112篇
  1996年   33160篇
  1995年   31727篇
  1994年   29830篇
  1993年   27905篇
  1992年   100975篇
  1991年   98177篇
  1990年   94933篇
  1989年   91595篇
  1988年   85200篇
  1987年   83726篇
  1986年   79607篇
  1985年   75901篇
  1984年   57686篇
  1983年   49809篇
  1982年   30152篇
  1981年   26998篇
  1980年   25374篇
  1979年   54639篇
  1978年   38983篇
  1977年   32808篇
  1976年   30705篇
  1975年   32657篇
  1974年   40090篇
  1973年   38539篇
  1972年   36356篇
  1971年   33725篇
  1970年   31724篇
  1969年   29677篇
  1968年   27234篇
排序方式: 共有10000条查询结果,搜索用时 187 毫秒
61.
62.
63.
64.
65.
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   
66.
67.
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   
68.
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   
69.
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