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   2375548篇
  免费   198483篇
  国内免费   4218篇
耳鼻咽喉   34298篇
儿科学   72889篇
妇产科学   63005篇
基础医学   335386篇
口腔科学   67629篇
临床医学   215915篇
内科学   469398篇
皮肤病学   47953篇
神经病学   201228篇
特种医学   96083篇
外国民族医学   886篇
外科学   360865篇
综合类   56307篇
现状与发展   1篇
一般理论   985篇
预防医学   191070篇
眼科学   55560篇
药学   177766篇
  4篇
中国医学   4374篇
肿瘤学   126647篇
  2018年   24276篇
  2016年   20621篇
  2015年   23352篇
  2014年   33620篇
  2013年   50976篇
  2012年   68902篇
  2011年   72480篇
  2010年   42604篇
  2009年   40979篇
  2008年   68921篇
  2007年   73281篇
  2006年   74204篇
  2005年   72242篇
  2004年   69552篇
  2003年   67211篇
  2002年   66435篇
  2001年   112534篇
  2000年   116612篇
  1999年   98422篇
  1998年   27914篇
  1997年   25569篇
  1996年   25482篇
  1995年   24643篇
  1994年   23192篇
  1993年   21589篇
  1992年   79454篇
  1991年   76463篇
  1990年   73642篇
  1989年   70898篇
  1988年   65909篇
  1987年   64862篇
  1986年   61392篇
  1985年   58466篇
  1984年   44272篇
  1983年   37690篇
  1982年   22925篇
  1981年   20371篇
  1980年   19069篇
  1979年   41352篇
  1978年   29034篇
  1977年   24394篇
  1976年   22861篇
  1975年   23983篇
  1974年   29666篇
  1973年   28075篇
  1972年   26248篇
  1971年   24167篇
  1970年   22769篇
  1969年   21110篇
  1968年   19161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.
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   
47.
48.
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   
49.
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   
50.
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