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   1467501篇
  免费   109442篇
  国内免费   2399篇
耳鼻咽喉   20764篇
儿科学   49798篇
妇产科学   39098篇
基础医学   210094篇
口腔科学   38748篇
临床医学   127097篇
内科学   299204篇
皮肤病学   33129篇
神经病学   117523篇
特种医学   56619篇
外国民族医学   715篇
外科学   220032篇
综合类   27893篇
现状与发展   1篇
一般理论   430篇
预防医学   113325篇
眼科学   31517篇
药学   108450篇
  2篇
中国医学   3074篇
肿瘤学   81829篇
  2021年   11350篇
  2019年   12669篇
  2018年   19455篇
  2017年   14183篇
  2016年   15145篇
  2015年   17128篇
  2014年   22401篇
  2013年   34236篇
  2012年   49947篇
  2011年   52061篇
  2010年   29711篇
  2009年   27100篇
  2008年   48422篇
  2007年   51849篇
  2006年   50957篇
  2005年   49736篇
  2004年   48076篇
  2003年   46023篇
  2002年   44777篇
  2001年   67587篇
  2000年   70144篇
  1999年   59687篇
  1998年   15850篇
  1997年   14350篇
  1996年   14734篇
  1995年   13948篇
  1994年   13207篇
  1993年   12183篇
  1992年   46614篇
  1991年   45343篇
  1990年   43974篇
  1989年   41720篇
  1988年   38453篇
  1987年   37656篇
  1986年   34970篇
  1985年   33539篇
  1984年   25089篇
  1983年   21090篇
  1982年   12230篇
  1981年   11079篇
  1979年   22179篇
  1978年   15422篇
  1977年   13086篇
  1976年   12141篇
  1975年   13213篇
  1974年   15398篇
  1973年   14853篇
  1972年   13611篇
  1971年   12352篇
  1970年   11645篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.

Background and objectives

A prompt and effective management of trauma patient is necessary. The aim of this case report is to highlight the importance of intraoperative echocardiography as a useful tool in patients suffering from refractory hemodynamic instability no otherwise explained.

Case report

A 41 year‐old woman suffered a car accident. At the emergency department, no abnormalities were found in ECG or chest X‐ray. Abdominal ultrasound revealed the presence of abdominal free liquid and the patient was submitted to urgent exploratory laparotomy. Nevertheless, she persisted suffering arterial hypotension and metabolic acidosis. Looking for the reason of her hemodynamic instability, intraoperative transthoracic echocardiography was performed, finding out the presence of pericardial effusion. Once the cardiac surgeon extracted pericardial clots, patient's situation improved clinically and analytically.

Conclusion

Every anesthesiologist should be able to use the intraoperative echocardiography as an effective tool in order to establish the appropriate measures to promote the survival of patients suffering severe trauma.  相似文献   
32.
33.
34.
35.
36.
37.
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   
38.
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   
39.
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   
40.
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