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   2735359篇
  免费   217936篇
  国内免费   4681篇
耳鼻咽喉   39480篇
儿科学   84983篇
妇产科学   72428篇
基础医学   396700篇
口腔科学   78626篇
临床医学   248491篇
内科学   528765篇
皮肤病学   56550篇
神经病学   223964篇
特种医学   108547篇
外国民族医学   936篇
外科学   414934篇
综合类   62239篇
现状与发展   1篇
一般理论   1069篇
预防医学   219595篇
眼科学   64573篇
药学   206877篇
  4篇
中国医学   5035篇
肿瘤学   144179篇
  2018年   27367篇
  2016年   23246篇
  2015年   26166篇
  2014年   37558篇
  2013年   57239篇
  2012年   77392篇
  2011年   82191篇
  2010年   48282篇
  2009年   46119篇
  2008年   78048篇
  2007年   83189篇
  2006年   84165篇
  2005年   81906篇
  2004年   79074篇
  2003年   76138篇
  2002年   75452篇
  2001年   126877篇
  2000年   131567篇
  1999年   110734篇
  1998年   31462篇
  1997年   28478篇
  1996年   28653篇
  1995年   27505篇
  1994年   25799篇
  1993年   24182篇
  1992年   89572篇
  1991年   87539篇
  1990年   84975篇
  1989年   82052篇
  1988年   76264篇
  1987年   75092篇
  1986年   71157篇
  1985年   67849篇
  1984年   51198篇
  1983年   43742篇
  1982年   26186篇
  1981年   23360篇
  1980年   21974篇
  1979年   48477篇
  1978年   34276篇
  1977年   28818篇
  1976年   27258篇
  1975年   29121篇
  1974年   35864篇
  1973年   33843篇
  1972年   31988篇
  1971年   29716篇
  1970年   27906篇
  1969年   26054篇
  1968年   23851篇
排序方式: 共有10000条查询结果,搜索用时 187 毫秒
51.
52.
53.
54.
55.
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   
56.
57.
58.
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   
59.
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   
60.
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