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   1458080篇
  免费   113436篇
  国内免费   2569篇
耳鼻咽喉   20355篇
儿科学   49184篇
妇产科学   38640篇
基础医学   205834篇
口腔科学   37715篇
临床医学   128736篇
内科学   296088篇
皮肤病学   30359篇
神经病学   118287篇
特种医学   57156篇
外国民族医学   673篇
外科学   224350篇
综合类   30055篇
现状与发展   3篇
一般理论   656篇
预防医学   112701篇
眼科学   31759篇
药学   107347篇
  3篇
中国医学   2756篇
肿瘤学   81428篇
  2019年   11951篇
  2018年   16522篇
  2017年   12712篇
  2016年   13783篇
  2015年   15854篇
  2014年   22399篇
  2013年   33870篇
  2012年   47166篇
  2011年   50329篇
  2010年   29878篇
  2009年   28109篇
  2008年   48333篇
  2007年   51694篇
  2006年   51521篇
  2005年   50845篇
  2004年   49678篇
  2003年   47693篇
  2002年   46688篇
  2001年   65655篇
  2000年   67768篇
  1999年   58198篇
  1998年   17590篇
  1997年   15846篇
  1996年   16079篇
  1995年   15153篇
  1994年   14318篇
  1993年   13275篇
  1992年   45609篇
  1991年   44477篇
  1990年   43153篇
  1989年   40969篇
  1988年   37798篇
  1987年   37136篇
  1986年   34505篇
  1985年   33247篇
  1984年   25458篇
  1983年   21594篇
  1982年   13356篇
  1981年   12160篇
  1980年   10928篇
  1979年   22079篇
  1978年   15697篇
  1977年   13388篇
  1976年   12454篇
  1975年   13256篇
  1974年   15246篇
  1973年   14644篇
  1972年   13328篇
  1971年   12055篇
  1970年   11353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