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   3275486篇
  免费   254217篇
  国内免费   6003篇
耳鼻咽喉   47602篇
儿科学   106579篇
妇产科学   89114篇
基础医学   461806篇
口腔科学   93841篇
临床医学   296493篇
内科学   635134篇
皮肤病学   68991篇
神经病学   267643篇
特种医学   132864篇
外国民族医学   1370篇
外科学   495410篇
综合类   74949篇
现状与发展   2篇
一般理论   1237篇
预防医学   263831篇
眼科学   76552篇
药学   244403篇
  8篇
中国医学   6042篇
肿瘤学   171835篇
  2018年   35275篇
  2017年   27992篇
  2016年   29945篇
  2015年   34689篇
  2014年   47489篇
  2013年   70020篇
  2012年   99031篇
  2011年   100445篇
  2010年   58901篇
  2009年   57556篇
  2008年   93578篇
  2007年   100189篇
  2006年   101060篇
  2005年   104876篇
  2004年   103164篇
  2003年   96503篇
  2002年   90962篇
  2001年   147902篇
  2000年   151995篇
  1999年   130708篇
  1998年   37369篇
  1997年   33754篇
  1996年   33631篇
  1995年   32451篇
  1994年   30391篇
  1993年   28389篇
  1992年   106407篇
  1991年   103804篇
  1990年   100687篇
  1989年   96902篇
  1988年   89720篇
  1987年   88368篇
  1986年   83618篇
  1985年   79693篇
  1984年   60230篇
  1983年   51227篇
  1982年   30386篇
  1981年   27166篇
  1979年   56492篇
  1978年   39416篇
  1977年   33281篇
  1976年   31233篇
  1975年   33785篇
  1974年   41236篇
  1973年   39121篇
  1972年   36685篇
  1971年   33933篇
  1970年   32128篇
  1969年   29793篇
  1968年   27135篇
排序方式: 共有10000条查询结果,搜索用时 15 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.
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   
68.
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   
69.
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   
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