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   3343668篇
  免费   259902篇
  国内免费   6722篇
耳鼻咽喉   49277篇
儿科学   102526篇
妇产科学   90663篇
基础医学   467304篇
口腔科学   98533篇
临床医学   301035篇
内科学   651380篇
皮肤病学   71103篇
神经病学   278494篇
特种医学   133266篇
外国民族医学   1258篇
外科学   509999篇
综合类   79468篇
现状与发展   7篇
一般理论   1363篇
预防医学   260607篇
眼科学   80365篇
药学   250338篇
  8篇
中国医学   6536篇
肿瘤学   176762篇
  2018年   33955篇
  2016年   29291篇
  2015年   33043篇
  2014年   47399篇
  2013年   71965篇
  2012年   96539篇
  2011年   102150篇
  2010年   60259篇
  2009年   58200篇
  2008年   97043篇
  2007年   103911篇
  2006年   104774篇
  2005年   102427篇
  2004年   98392篇
  2003年   95149篇
  2002年   93716篇
  2001年   150637篇
  2000年   155499篇
  1999年   132214篇
  1998年   38483篇
  1997年   34953篇
  1996年   33962篇
  1995年   32823篇
  1994年   30712篇
  1993年   28550篇
  1992年   105508篇
  1991年   101771篇
  1990年   98716篇
  1989年   95553篇
  1988年   88797篇
  1987年   87486篇
  1986年   83361篇
  1985年   79656篇
  1984年   60356篇
  1983年   51444篇
  1982年   31554篇
  1981年   28275篇
  1980年   26475篇
  1979年   57083篇
  1978年   40526篇
  1977年   34667篇
  1976年   32033篇
  1975年   34713篇
  1974年   42183篇
  1973年   40377篇
  1972年   38202篇
  1971年   35551篇
  1970年   33580篇
  1969年   31485篇
  1968年   28979篇
排序方式: 共有10000条查询结果,搜索用时 10 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.
We report on a child with several café au lait spots in association with a lumbar lipomeningomyelocele as an apparently new association. Cutaneous markers, the identification of which plays a crucial role in the early diagnosis and management of spinal malformations, can accompany occult spinal dysraphism. Herein we report a case of lumbar lipomeningomyelocele associated with an overlying café au lait spot that served as a marker of occult spinal dysraphism. The patient also had segmental café au lait spots on the face, making the association unique.  相似文献   
58.
59.
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   
60.
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