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   2808467篇
  免费   200008篇
  国内免费   8054篇
耳鼻咽喉   37334篇
儿科学   91454篇
妇产科学   76722篇
基础医学   395449篇
口腔科学   76369篇
临床医学   252404篇
内科学   564657篇
皮肤病学   68710篇
神经病学   233498篇
特种医学   105841篇
外国民族医学   810篇
外科学   414454篇
综合类   51459篇
现状与发展   5篇
一般理论   1036篇
预防医学   217802篇
眼科学   61376篇
药学   203780篇
  8篇
中国医学   6103篇
肿瘤学   157258篇
  2021年   24155篇
  2019年   25260篇
  2018年   37330篇
  2017年   27712篇
  2016年   31212篇
  2015年   35114篇
  2014年   46634篇
  2013年   69932篇
  2012年   96877篇
  2011年   101642篇
  2010年   59522篇
  2009年   55410篇
  2008年   93177篇
  2007年   99026篇
  2006年   99344篇
  2005年   95440篇
  2004年   91240篇
  2003年   87533篇
  2002年   84166篇
  2001年   132175篇
  2000年   135385篇
  1999年   113967篇
  1998年   32011篇
  1997年   28543篇
  1996年   28778篇
  1995年   27893篇
  1994年   25504篇
  1993年   23833篇
  1992年   87254篇
  1991年   83436篇
  1990年   80572篇
  1989年   77672篇
  1988年   71028篇
  1987年   69425篇
  1986年   64884篇
  1985年   61797篇
  1984年   45936篇
  1983年   38782篇
  1982年   22970篇
  1981年   20401篇
  1979年   39872篇
  1978年   28089篇
  1977年   23882篇
  1976年   22018篇
  1975年   23484篇
  1974年   27623篇
  1973年   26248篇
  1972年   24540篇
  1971年   22735篇
  1970年   20970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