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   3439212篇
  免费   245045篇
  国内免费   8779篇
耳鼻咽喉   47360篇
儿科学   114511篇
妇产科学   95911篇
基础医学   485303篇
口腔科学   94822篇
临床医学   308092篇
内科学   673723篇
皮肤病学   79448篇
神经病学   280175篇
特种医学   133744篇
外国民族医学   1047篇
外科学   520734篇
综合类   69955篇
现状与发展   6篇
一般理论   1192篇
预防医学   263853篇
眼科学   77591篇
药学   252620篇
  9篇
中国医学   6801篇
肿瘤学   186139篇
  2018年   43383篇
  2017年   33447篇
  2016年   39015篇
  2015年   36362篇
  2014年   49905篇
  2013年   75237篇
  2012年   102083篇
  2011年   112778篇
  2010年   69461篇
  2009年   64955篇
  2008年   106595篇
  2007年   114693篇
  2006年   108734篇
  2005年   105912篇
  2004年   102404篇
  2003年   99839篇
  2002年   96102篇
  2001年   158214篇
  2000年   162259篇
  1999年   137060篇
  1998年   39874篇
  1997年   35432篇
  1996年   35596篇
  1995年   34281篇
  1994年   31756篇
  1993年   29770篇
  1992年   108091篇
  1991年   104789篇
  1990年   102028篇
  1989年   98851篇
  1988年   91052篇
  1987年   89397篇
  1986年   84333篇
  1985年   80612篇
  1984年   59871篇
  1983年   51420篇
  1982年   30663篇
  1981年   27192篇
  1979年   54334篇
  1978年   38342篇
  1977年   32838篇
  1976年   30621篇
  1975年   33007篇
  1974年   38882篇
  1973年   37104篇
  1972年   35175篇
  1971年   32576篇
  1970年   30412篇
  1969年   29200篇
  1968年   27064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