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   3289519篇
  免费   259107篇
  国内免费   5943篇
耳鼻咽喉   47343篇
儿科学   105246篇
妇产科学   88213篇
基础医学   466579篇
口腔科学   93538篇
临床医学   298893篇
内科学   643023篇
皮肤病学   69334篇
神经病学   273404篇
特种医学   129358篇
外国民族医学   1334篇
外科学   493542篇
综合类   74724篇
现状与发展   2篇
一般理论   1279篇
预防医学   265750篇
眼科学   76283篇
药学   246154篇
  6篇
中国医学   6398篇
肿瘤学   174166篇
  2018年   37381篇
  2017年   28178篇
  2016年   30738篇
  2015年   34698篇
  2014年   48157篇
  2013年   73640篇
  2012年   102832篇
  2011年   108231篇
  2010年   62660篇
  2009年   58834篇
  2008年   101618篇
  2007年   108457篇
  2006年   108223篇
  2005年   105318篇
  2004年   101620篇
  2003年   97921篇
  2002年   95770篇
  2001年   147733篇
  2000年   152922篇
  1999年   129710篇
  1998年   37504篇
  1997年   33970篇
  1996年   33794篇
  1995年   32587篇
  1994年   30538篇
  1993年   28503篇
  1992年   104091篇
  1991年   101146篇
  1990年   97681篇
  1989年   94017篇
  1988年   87114篇
  1987年   85805篇
  1986年   80974篇
  1985年   77469篇
  1984年   58768篇
  1983年   50029篇
  1982年   30138篇
  1981年   27008篇
  1979年   54733篇
  1978年   38330篇
  1977年   32479篇
  1976年   30468篇
  1975年   32454篇
  1974年   39555篇
  1973年   37731篇
  1972年   35176篇
  1971年   32358篇
  1970年   30644篇
  1969年   28405篇
  1968年   25886篇
排序方式: 共有10000条查询结果,搜索用时 17 毫秒
71.
72.
73.
74.
75.
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   
76.
77.
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   
78.
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   
79.
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   
80.
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