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   2618224篇
  免费   191498篇
  国内免费   7654篇
耳鼻咽喉   34657篇
儿科学   86068篇
妇产科学   72190篇
基础医学   368194篇
口腔科学   70632篇
临床医学   237931篇
内科学   522190篇
皮肤病学   62970篇
神经病学   216806篇
特种医学   101708篇
外国民族医学   747篇
外科学   391580篇
综合类   50832篇
现状与发展   5篇
一般理论   1004篇
预防医学   199238篇
眼科学   57643篇
药学   190161篇
  8篇
中国医学   5389篇
肿瘤学   147423篇
  2021年   20557篇
  2019年   21198篇
  2018年   29951篇
  2017年   23139篇
  2016年   26858篇
  2015年   30237篇
  2014年   41507篇
  2013年   61981篇
  2012年   82497篇
  2011年   86919篇
  2010年   52405篇
  2009年   50403篇
  2008年   81316篇
  2007年   86165篇
  2006年   87892篇
  2005年   83995篇
  2004年   80800篇
  2003年   78115篇
  2002年   75344篇
  2001年   128818篇
  2000年   131700篇
  1999年   110936篇
  1998年   31696篇
  1997年   28272篇
  1996年   28530篇
  1995年   27664篇
  1994年   25304篇
  1993年   23639篇
  1992年   85405篇
  1991年   81782篇
  1990年   78982篇
  1989年   76268篇
  1988年   69657篇
  1987年   68184篇
  1986年   63712篇
  1985年   60712篇
  1984年   45152篇
  1983年   38142篇
  1982年   22682篇
  1981年   20201篇
  1979年   39119篇
  1978年   27606篇
  1977年   23390篇
  1976年   21627篇
  1975年   22948篇
  1974年   26917篇
  1973年   25478篇
  1972年   23852篇
  1971年   22026篇
  1970年   20249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