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   159218篇
  免费   11077篇
  国内免费   366篇
耳鼻咽喉   1619篇
儿科学   4198篇
妇产科学   3187篇
基础医学   23602篇
口腔科学   3893篇
临床医学   13881篇
内科学   33418篇
皮肤病学   2571篇
神经病学   15302篇
特种医学   6469篇
外国民族医学   10篇
外科学   21710篇
综合类   736篇
现状与发展   1篇
一般理论   124篇
预防医学   16370篇
眼科学   2405篇
药学   9323篇
中国医学   279篇
肿瘤学   11563篇
  2023年   725篇
  2022年   1268篇
  2021年   2768篇
  2020年   1919篇
  2019年   2878篇
  2018年   3594篇
  2017年   2898篇
  2016年   3088篇
  2015年   3540篇
  2014年   4939篇
  2013年   6510篇
  2012年   9896篇
  2011年   10198篇
  2010年   5406篇
  2009年   5532篇
  2008年   8975篇
  2007年   9307篇
  2006年   8850篇
  2005年   8436篇
  2004年   7334篇
  2003年   6902篇
  2002年   6250篇
  2001年   4695篇
  2000年   4545篇
  1999年   4129篇
  1998年   1974篇
  1997年   1609篇
  1996年   1596篇
  1995年   1340篇
  1994年   1236篇
  1993年   1129篇
  1992年   2769篇
  1991年   2504篇
  1990年   2360篇
  1989年   2200篇
  1988年   2004篇
  1987年   1756篇
  1986年   1676篇
  1985年   1616篇
  1984年   1193篇
  1983年   1051篇
  1982年   602篇
  1981年   530篇
  1980年   454篇
  1979年   893篇
  1978年   556篇
  1977年   450篇
  1974年   440篇
  1973年   427篇
  1972年   382篇
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
91.
92.
Cognitive deficits associated with closed head injury (CHI) have been well studied. Less attention has been directed to the emotional consequences of CHI and subsequent attempts to cope with major life events. CHI typically constitutes a catastrophic injury, yet few studies have examined coping strategies used by individuals after CHI or the effects of CHI on family functioning that may mediate coping. Previous workers have speculated that time since injury is a crucial determinant of coping; however, this has not been investigated with regard to CHI. In this preliminary investigation, 40 patients with CHI were compared with 17 neurologically intact controls. The CHI group was divided into two groups according to time since injury. It was found that patients with CHI used information seeking as their most dominant coping strategy regardless of their time since injury. Patients with CHI had higher family cohesion scores than control subjects. Implications of these findings for psychological response to CHI are discussed.  相似文献   
93.
94.
The ultrasonographic characteristics of an epidermoid cyst of the testicle are presented. Since these, findings are similar to other published case reports, preoperative sonographic diagnosis of this lagon may be possible.  相似文献   
95.
96.
97.
Optimal treatment of Smith's fracture remains controversial. Conservative management of type III fractures is acceptable, but results are moderate for types I and II.

This study includes 53 patients operated on during the past 10 years; six of type I, 17 of type II and 30 of type III.

The functional end result was good in 32 cases (60.3 per cent) and excellent in nine cases (16.9 per cent).

Functional results of types I, II and III were comparable when the excellent and good groups were added together.

There was no correlation between anatomical result and functional outcome (κ = 0.07), although a good anatomical result usually accompanied a good to excellent functional end result. Operative treatment of Smith's fractures have good functional end results in our hands, regardless of the fracture type.  相似文献   

98.
Experience with the P.A.S.-PORT, a peripherally implanted central venous access device, is evaluated in a retrospective review of 154 patients from July 1991 to June 1994. Blood could not be aspirated from six patients. Complications included temporary minor thrombophlebitis in seven patients (4.5%), symptomatic axillary or subclavian vein thrombosis in five patients (3.2%), clotted port in two patients (1.2%), port pocket cellulitis in two patients (1.2%), and fungal sepsis in two patients (1.2%). In six patients (3.8%) the P.A.S.-PORT had to be removed because of complications. The P.A.S.-PORT facilitated delivery of chemotherapy, parenteral nutrition, blood products, antibiotics, hydration, and blood sampling. It was demonstrated that the P.A.S.-PORT may be inserted and used with a low incidence of complications in gynecologic cancer patients.  相似文献   
99.
100.
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