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   2606513篇
  免费   191543篇
  国内免费   9199篇
耳鼻咽喉   34499篇
儿科学   85428篇
妇产科学   71850篇
基础医学   366457篇
口腔科学   70046篇
临床医学   237687篇
内科学   518691篇
皮肤病学   62629篇
神经病学   214865篇
特种医学   100839篇
外国民族医学   760篇
外科学   388978篇
综合类   54280篇
现状与发展   10篇
一般理论   977篇
预防医学   197600篇
眼科学   57233篇
药学   190521篇
  19篇
中国医学   6603篇
肿瘤学   147283篇
  2021年   21183篇
  2019年   21420篇
  2018年   30154篇
  2017年   23349篇
  2016年   26991篇
  2015年   30676篇
  2014年   41788篇
  2013年   61616篇
  2012年   82139篇
  2011年   86500篇
  2010年   52306篇
  2009年   50193篇
  2008年   80436篇
  2007年   85278篇
  2006年   87012篇
  2005年   83061篇
  2004年   79779篇
  2003年   77137篇
  2002年   74276篇
  2001年   128922篇
  2000年   131789篇
  1999年   110950篇
  1998年   31550篇
  1997年   28237篇
  1996年   28483篇
  1995年   27640篇
  1994年   25286篇
  1993年   23566篇
  1992年   85317篇
  1991年   81702篇
  1990年   78906篇
  1989年   76131篇
  1988年   69535篇
  1987年   68065篇
  1986年   63594篇
  1985年   60557篇
  1984年   44984篇
  1983年   37957篇
  1982年   22476篇
  1981年   20007篇
  1979年   38973篇
  1978年   27449篇
  1977年   23259篇
  1976年   21500篇
  1975年   22814篇
  1974年   26793篇
  1973年   25375篇
  1972年   23750篇
  1971年   21958篇
  1970年   20184篇
排序方式: 共有10000条查询结果,搜索用时 406 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