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   2605924篇
  免费   191206篇
  国内免费   7945篇
耳鼻咽喉   34505篇
儿科学   85800篇
妇产科学   71986篇
基础医学   366881篇
口腔科学   70045篇
临床医学   236715篇
内科学   519793篇
皮肤病学   62972篇
神经病学   215136篇
特种医学   100805篇
外国民族医学   746篇
外科学   389375篇
综合类   51605篇
现状与发展   6篇
一般理论   970篇
预防医学   197912篇
眼科学   57059篇
药学   189912篇
  14篇
中国医学   5939篇
肿瘤学   146899篇
  2021年   20869篇
  2019年   21309篇
  2018年   30085篇
  2017年   23201篇
  2016年   26823篇
  2015年   30260篇
  2014年   41380篇
  2013年   61616篇
  2012年   81915篇
  2011年   86209篇
  2010年   52115篇
  2009年   50050篇
  2008年   80257篇
  2007年   85124篇
  2006年   86827篇
  2005年   82897篇
  2004年   79725篇
  2003年   77009篇
  2002年   74200篇
  2001年   128955篇
  2000年   131883篇
  1999年   111033篇
  1998年   31494篇
  1997年   28131篇
  1996年   28386篇
  1995年   27515篇
  1994年   25210篇
  1993年   23534篇
  1992年   85426篇
  1991年   81817篇
  1990年   78997篇
  1989年   76250篇
  1988年   69666篇
  1987年   68199篇
  1986年   63729篇
  1985年   60681篇
  1984年   45081篇
  1983年   38053篇
  1982年   22523篇
  1981年   20044篇
  1979年   39072篇
  1978年   27507篇
  1977年   23324篇
  1976年   21552篇
  1975年   22865篇
  1974年   26876篇
  1973年   25437篇
  1972年   23822篇
  1971年   22008篇
  1970年   20247篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
Henna, derived from a combination of natural leaves and coloring additives, is a common decorative dye traditionally used in many Islamic religious celebrations. Para‐phenylenediamine (PPD), a major component of black henna tattoo, is a strong sensitizer and common allergen. We report a case of severe connubial allergic contact dermatitis after black henna heterotransfer in a girl.  相似文献   
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.
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   
77.
78.
79.
80.
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