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   1288278篇
  免费   100749篇
  国内免费   2014篇
耳鼻咽喉   18573篇
儿科学   44774篇
妇产科学   35240篇
基础医学   183981篇
口腔科学   33893篇
临床医学   112474篇
内科学   260571篇
皮肤病学   28211篇
神经病学   101208篇
特种医学   51573篇
外国民族医学   661篇
外科学   197968篇
综合类   27125篇
现状与发展   1篇
一般理论   385篇
预防医学   96690篇
眼科学   28215篇
药学   95710篇
  2篇
中国医学   2436篇
肿瘤学   71350篇
  2018年   13374篇
  2017年   10192篇
  2016年   11147篇
  2015年   12588篇
  2014年   17509篇
  2013年   26658篇
  2012年   36635篇
  2011年   38618篇
  2010年   23130篇
  2009年   22110篇
  2008年   37120篇
  2007年   39752篇
  2006年   39957篇
  2005年   38899篇
  2004年   38101篇
  2003年   36866篇
  2002年   36194篇
  2001年   64280篇
  2000年   66801篇
  1999年   56681篇
  1998年   15281篇
  1997年   13864篇
  1996年   14318篇
  1995年   13567篇
  1994年   12876篇
  1993年   11907篇
  1992年   44785篇
  1991年   43718篇
  1990年   42468篇
  1989年   40362篇
  1988年   37082篇
  1987年   36443篇
  1986年   33780篇
  1985年   32475篇
  1984年   24273篇
  1983年   20390篇
  1982年   11818篇
  1981年   10772篇
  1980年   9580篇
  1979年   21463篇
  1978年   14908篇
  1977年   12616篇
  1976年   11757篇
  1975年   12700篇
  1974年   14744篇
  1973年   14200篇
  1972年   13008篇
  1971年   11790篇
  1970年   11122篇
  1969年   10078篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
22.

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   
23.
24.
25.
26.
27.
28.
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   
29.
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   
30.
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