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   2588200篇
  免费   189964篇
  国内免费   7570篇
耳鼻咽喉   34331篇
儿科学   85364篇
妇产科学   71808篇
基础医学   364699篇
口腔科学   69779篇
临床医学   235288篇
内科学   516071篇
皮肤病学   62489篇
神经病学   213921篇
特种医学   100026篇
外国民族医学   736篇
外科学   387185篇
综合类   50488篇
现状与发展   5篇
一般理论   976篇
预防医学   196672篇
眼科学   56709篇
药学   188275篇
  8篇
中国医学   5334篇
肿瘤学   145570篇
  2021年   20100篇
  2019年   20728篇
  2018年   29388篇
  2017年   22683篇
  2016年   26343篇
  2015年   29637篇
  2014年   40623篇
  2013年   60716篇
  2012年   80607篇
  2011年   84869篇
  2010年   51264篇
  2009年   49371篇
  2008年   79414篇
  2007年   84238篇
  2006年   85939篇
  2005年   82068篇
  2004年   79064篇
  2003年   76402篇
  2002年   73649篇
  2001年   128527篇
  2000年   131449篇
  1999年   110621篇
  1998年   31337篇
  1997年   27987篇
  1996年   28302篇
  1995年   27445篇
  1994年   25122篇
  1993年   23474篇
  1992年   85254篇
  1991年   81671篇
  1990年   78903篇
  1989年   76164篇
  1988年   69577篇
  1987年   68074篇
  1986年   63660篇
  1985年   60601篇
  1984年   45006篇
  1983年   38011篇
  1982年   22506篇
  1981年   20039篇
  1979年   39026篇
  1978年   27493篇
  1977年   23307篇
  1976年   21542篇
  1975年   22856篇
  1974年   26836篇
  1973年   25437篇
  1972年   23794篇
  1971年   21995篇
  1970年   20227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