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   1745082篇
  免费   130230篇
  国内免费   3913篇
耳鼻咽喉   22434篇
儿科学   57081篇
妇产科学   47516篇
基础医学   249874篇
口腔科学   50125篇
临床医学   156466篇
内科学   343721篇
皮肤病学   39422篇
神经病学   136141篇
特种医学   66098篇
外国民族医学   287篇
外科学   263953篇
综合类   39390篇
现状与发展   4篇
一般理论   604篇
预防医学   128432篇
眼科学   41227篇
药学   127478篇
  7篇
中国医学   4602篇
肿瘤学   104363篇
  2021年   13662篇
  2019年   14314篇
  2018年   20865篇
  2017年   15871篇
  2016年   17397篇
  2015年   19872篇
  2014年   27342篇
  2013年   39926篇
  2012年   55194篇
  2011年   58041篇
  2010年   34619篇
  2009年   32249篇
  2008年   53834篇
  2007年   57242篇
  2006年   57698篇
  2005年   54886篇
  2004年   53101篇
  2003年   50328篇
  2002年   48611篇
  2001年   93340篇
  2000年   95209篇
  1999年   78441篇
  1998年   20464篇
  1997年   17870篇
  1996年   17924篇
  1995年   17301篇
  1994年   15747篇
  1993年   14561篇
  1992年   58541篇
  1991年   56354篇
  1990年   54040篇
  1989年   51831篇
  1988年   47035篇
  1987年   45819篇
  1986年   43067篇
  1985年   40757篇
  1984年   29922篇
  1983年   25454篇
  1982年   14305篇
  1981年   12779篇
  1979年   26058篇
  1978年   17895篇
  1977年   15207篇
  1976年   14133篇
  1975年   14890篇
  1974年   17983篇
  1973年   17246篇
  1972年   15973篇
  1971年   14718篇
  1970年   13638篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
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   
42.
43.
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   
44.
45.
Dosage form is a mean used for the delivery of drug to a living body. In order to get the desired effect the drug should be delivered to its site of action at such rate and concentration to achieve the maximum therapeutic effect and minimum adverse effect. Since oral route is still widely accepted route but having a common drawback of difficulty in swallowing of tablets and capsules. Therefore a lot of research has been done on novel drug delivery systems. This review is about oral dispersible tablets a novel approach in drug delivery systems that are now a day''s more focused in formulation world, and laid a new path that, helped the patients to build their compliance level with the therapy, also reduced the cost and ease the administration especially in case of pediatrics and geriatrics. Quick absorption, rapid onset of action and reduction in drug loss properties are the basic advantages of this dosage form.  相似文献   
46.
Sinus venosus atrial septal defect (SV‐ASD) usually coexists with partial anomalous pulmonary vein connection (PAPVC). It is a difficult diagnosis in transthoracic echocardiography (TTE) due to eccentric position of defects. We present a rare case of atypical anatomical variation in PAPVC, which was never described before. Two right pulmonary veins drained into superior vena cava, which overrode SV‐ASD and interatrial septum, a third pulmonary vein into the right atrium. Complete diagnosis could not be set after TTE, nor transesophageal echocardiography, whereas angio‐CT was finally conclusive. This diagnostic approach allowed the surgical planning.  相似文献   
47.
48.
49.
50.
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