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   2642078篇
  免费   193115篇
  国内免费   8211篇
耳鼻咽喉   35025篇
儿科学   86937篇
妇产科学   73051篇
基础医学   371444篇
口腔科学   71115篇
临床医学   239506篇
内科学   527664篇
皮肤病学   63660篇
神经病学   219035篇
特种医学   102121篇
外国民族医学   754篇
外科学   395039篇
综合类   51830篇
现状与发展   5篇
一般理论   1002篇
预防医学   199588篇
眼科学   57596篇
药学   192836篇
  10篇
中国医学   5768篇
肿瘤学   149418篇
  2021年   21358篇
  2019年   21836篇
  2018年   30680篇
  2017年   23680篇
  2016年   27429篇
  2015年   30886篇
  2014年   42260篇
  2013年   63002篇
  2012年   83681篇
  2011年   88059篇
  2010年   53322篇
  2009年   51207篇
  2008年   82137篇
  2007年   87033篇
  2006年   88615篇
  2005年   84588篇
  2004年   81834篇
  2003年   79069篇
  2002年   76302篇
  2001年   130134篇
  2000年   133001篇
  1999年   111860篇
  1998年   31906篇
  1997年   28437篇
  1996年   28650篇
  1995年   27813篇
  1994年   25458篇
  1993年   23784篇
  1992年   86006篇
  1991年   82369篇
  1990年   79496篇
  1989年   76746篇
  1988年   70110篇
  1987年   68539篇
  1986年   64090篇
  1985年   61031篇
  1984年   45365篇
  1983年   38320篇
  1982年   22717篇
  1981年   20207篇
  1979年   39294篇
  1978年   27685篇
  1977年   23472篇
  1976年   21713篇
  1975年   23086篇
  1974年   27082篇
  1973年   25661篇
  1972年   24040篇
  1971年   22212篇
  1970年   20425篇
排序方式: 共有10000条查询结果,搜索用时 312 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