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   2412840篇
  免费   200655篇
  国内免费   4393篇
耳鼻咽喉   34893篇
儿科学   73780篇
妇产科学   63636篇
基础医学   339893篇
口腔科学   68461篇
临床医学   219775篇
内科学   476824篇
皮肤病学   48762篇
神经病学   205041篇
特种医学   97215篇
外国民族医学   886篇
外科学   367381篇
综合类   56657篇
现状与发展   1篇
一般理论   1019篇
预防医学   193776篇
眼科学   56374篇
药学   179952篇
  6篇
中国医学   4400篇
肿瘤学   129156篇
  2018年   25172篇
  2017年   19497篇
  2016年   21390篇
  2015年   24202篇
  2014年   34814篇
  2013年   52721篇
  2012年   71690篇
  2011年   75509篇
  2010年   44238篇
  2009年   42493篇
  2008年   71707篇
  2007年   76138篇
  2006年   76902篇
  2005年   74968篇
  2004年   72160篇
  2003年   69761篇
  2002年   68803篇
  2001年   112765篇
  2000年   116798篇
  1999年   98725篇
  1998年   28367篇
  1997年   25956篇
  1996年   25815篇
  1995年   24968篇
  1994年   23471篇
  1993年   21813篇
  1992年   79604篇
  1991年   76566篇
  1990年   73740篇
  1989年   70958篇
  1988年   66010篇
  1987年   64927篇
  1986年   61460篇
  1985年   58538篇
  1984年   44394篇
  1983年   37831篇
  1982年   23147篇
  1981年   20551篇
  1980年   19220篇
  1979年   41365篇
  1978年   29078篇
  1977年   24439篇
  1976年   22882篇
  1975年   24001篇
  1974年   29679篇
  1973年   28079篇
  1972年   26241篇
  1971年   24163篇
  1970年   22760篇
  1969年   21097篇
排序方式: 共有10000条查询结果,搜索用时 31 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