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   2629147篇
  免费   192673篇
  国内免费   7781篇
耳鼻咽喉   34794篇
儿科学   86352篇
妇产科学   72691篇
基础医学   369291篇
口腔科学   70924篇
临床医学   239159篇
内科学   525567篇
皮肤病学   63039篇
神经病学   217016篇
特种医学   101286篇
外国民族医学   738篇
外科学   393544篇
综合类   51202篇
现状与发展   6篇
一般理论   1065篇
预防医学   200008篇
眼科学   58072篇
药学   191340篇
  8篇
中国医学   5442篇
肿瘤学   148057篇
  2021年   20859篇
  2019年   21365篇
  2018年   30166篇
  2017年   23206篇
  2016年   26934篇
  2015年   30342篇
  2014年   41761篇
  2013年   62592篇
  2012年   83076篇
  2011年   87633篇
  2010年   52844篇
  2009年   50857篇
  2008年   82137篇
  2007年   87077篇
  2006年   88664篇
  2005年   84963篇
  2004年   81714篇
  2003年   78731篇
  2002年   76041篇
  2001年   128874篇
  2000年   131719篇
  1999年   110997篇
  1998年   31803篇
  1997年   28364篇
  1996年   28569篇
  1995年   27728篇
  1994年   25392篇
  1993年   23721篇
  1992年   85481篇
  1991年   81875篇
  1990年   79044篇
  1989年   76312篇
  1988年   69726篇
  1987年   68263篇
  1986年   63786篇
  1985年   60816篇
  1984年   45263篇
  1983年   38223篇
  1982年   22854篇
  1981年   20343篇
  1979年   39187篇
  1978年   27681篇
  1977年   23479篇
  1976年   21692篇
  1975年   23028篇
  1974年   26970篇
  1973年   25532篇
  1972年   23890篇
  1971年   22028篇
  1970年   20295篇
排序方式: 共有10000条查询结果,搜索用时 125 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