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   2165330篇
  免费   156919篇
  国内免费   3190篇
耳鼻咽喉   31313篇
儿科学   72249篇
妇产科学   58993篇
基础医学   307464篇
口腔科学   59325篇
临床医学   190788篇
内科学   422543篇
皮肤病学   48652篇
神经病学   167573篇
特种医学   86485篇
外国民族医学   859篇
外科学   331432篇
综合类   44889篇
现状与发展   2篇
一般理论   617篇
预防医学   158295篇
眼科学   48867篇
药学   166600篇
  9篇
中国医学   4683篇
肿瘤学   123801篇
  2018年   22387篇
  2017年   17190篇
  2016年   19060篇
  2015年   21439篇
  2014年   29604篇
  2013年   44539篇
  2012年   61017篇
  2011年   64595篇
  2010年   38492篇
  2009年   36309篇
  2008年   60957篇
  2007年   65261篇
  2006年   66136篇
  2005年   63941篇
  2004年   61998篇
  2003年   59936篇
  2002年   58405篇
  2001年   111552篇
  2000年   115509篇
  1999年   97241篇
  1998年   25286篇
  1997年   22646篇
  1996年   22993篇
  1995年   21663篇
  1994年   20171篇
  1993年   18865篇
  1992年   75301篇
  1991年   72900篇
  1990年   71418篇
  1989年   68358篇
  1988年   62454篇
  1987年   61095篇
  1986年   57159篇
  1985年   54429篇
  1984年   40100篇
  1983年   33737篇
  1982年   19023篇
  1981年   17073篇
  1979年   35768篇
  1978年   24444篇
  1977年   21235篇
  1976年   19175篇
  1975年   21254篇
  1974年   24748篇
  1973年   23828篇
  1972年   22349篇
  1971年   20586篇
  1970年   19261篇
  1969年   18047篇
  1968年   16196篇
排序方式: 共有10000条查询结果,搜索用时 421 毫秒
41.
42.

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   
43.
44.
45.
46.
47.
48.
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   
49.
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   
50.
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   
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