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   1485021篇
  免费   113160篇
  国内免费   2859篇
耳鼻咽喉   20683篇
儿科学   49746篇
妇产科学   38819篇
基础医学   208179篇
口腔科学   37623篇
临床医学   132740篇
内科学   301255篇
皮肤病学   30838篇
神经病学   121709篇
特种医学   60316篇
外国民族医学   673篇
外科学   228946篇
综合类   29311篇
现状与发展   2篇
一般理论   543篇
预防医学   110580篇
眼科学   32944篇
药学   108592篇
  3篇
中国医学   2716篇
肿瘤学   84822篇
  2021年   12599篇
  2019年   13438篇
  2018年   18425篇
  2017年   13847篇
  2016年   15162篇
  2015年   17390篇
  2014年   24461篇
  2013年   36212篇
  2012年   51130篇
  2011年   53926篇
  2010年   31736篇
  2009年   30147篇
  2008年   50705篇
  2007年   54047篇
  2006年   53958篇
  2005年   52689篇
  2004年   51072篇
  2003年   48721篇
  2002年   47523篇
  2001年   65730篇
  2000年   67797篇
  1999年   58191篇
  1998年   17599篇
  1997年   15735篇
  1996年   15925篇
  1995年   15032篇
  1994年   14138篇
  1993年   13149篇
  1992年   45434篇
  1991年   44296篇
  1990年   42919篇
  1989年   40778篇
  1988年   37500篇
  1987年   36762篇
  1986年   34195篇
  1985年   32891篇
  1984年   24969篇
  1983年   20990篇
  1982年   12659篇
  1981年   11565篇
  1979年   21777篇
  1978年   15292篇
  1977年   12944篇
  1976年   12080篇
  1975年   12906篇
  1974年   14944篇
  1973年   14363篇
  1972年   13105篇
  1971年   11872篇
  1970年   11153篇
排序方式: 共有10000条查询结果,搜索用时 17 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.
This article describes a case of anaphylaxis secondary to chlorhexidine during urethral catheterisation. Despite little evidence for the use of antiseptic lubricants in preventing catheter-associated urinary tract infections, the distribution and use of such products continues to be widespread. Chlorhexidine-free lubricating gel is widely available and should be used for urological procedures wherever possible.  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