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   32973篇
  免费   2073篇
  国内免费   133篇
耳鼻咽喉   378篇
儿科学   803篇
妇产科学   480篇
基础医学   4718篇
口腔科学   718篇
临床医学   3228篇
内科学   7070篇
皮肤病学   641篇
神经病学   3415篇
特种医学   1898篇
外国民族医学   25篇
外科学   4538篇
综合类   216篇
一般理论   13篇
预防医学   2599篇
眼科学   427篇
药学   2294篇
中国医学   63篇
肿瘤学   1655篇
  2023年   191篇
  2022年   275篇
  2021年   653篇
  2020年   401篇
  2019年   555篇
  2018年   664篇
  2017年   493篇
  2016年   639篇
  2015年   698篇
  2014年   938篇
  2013年   1317篇
  2012年   1999篇
  2011年   2021篇
  2010年   1187篇
  2009年   1146篇
  2008年   1842篇
  2007年   1811篇
  2006年   1791篇
  2005年   1755篇
  2004年   1578篇
  2003年   1458篇
  2002年   1348篇
  2001年   718篇
  2000年   716篇
  1999年   634篇
  1998年   351篇
  1997年   281篇
  1996年   202篇
  1995年   229篇
  1994年   245篇
  1993年   302篇
  1992年   637篇
  1991年   582篇
  1990年   495篇
  1989年   337篇
  1988年   311篇
  1987年   306篇
  1986年   258篇
  1985年   295篇
  1984年   231篇
  1983年   172篇
  1982年   143篇
  1979年   184篇
  1978年   150篇
  1977年   149篇
  1976年   146篇
  1975年   162篇
  1974年   202篇
  1973年   170篇
  1971年   145篇
排序方式: 共有10000条查询结果,搜索用时 203 毫秒
1.
European Surgery - Large skin defects caused by trauma (e.g., burns) or due to other reasons (e.g., tumor-related skin resections) require sufficient skin replacement. The constant improvement of...  相似文献   
2.
3.
Abstract

Gaining a better grasp on factors related to changes in alcohol use is of particular interest for clinicians. Past research has highlighted a negative link between future time perspective (i.e. a disposition guiding how individuals consider and act regarding their future) and alcohol misuse. However, much remains at stake in the understanding of this association. The objective of this research was to explore bidirectional relationships between future time perspective and severity of alcohol-related problems, in a clinical setting. The sample includes 79 patients followed up in an outpatient alcohol treatment centre. Two measurement times were planned: at entry into care and 6 months later. Multiple linear regression analyses were carried out, controlling for sociodemographic variables. We found that baseline future time perspective predicted level of alcohol-related problems after 6 months in treatment, even when effects of baseline alcohol-related problems and sociodemographic variables were controlled. This study shows that the way patients see and position themselves regarding their future can affect level of alcohol-related problems. It may be useful for clinicians to identify patients with low future time perspective to offer tailored interventions and consider this dimension as a resource for change.  相似文献   
4.
5.

Objective

Low psoas muscle area is shown to be an indicator for worse postoperative outcome in patients undergoing vascular surgical. Additionally, it has been associated with longer durations of hospital stay in patients with cancer who undergo surgery and subsequently greater health care costs in Europe and the United States. We sought to evaluate this effect on hospital expenditure for patients undergoing vascular repair in a health care system with universal access.

Methods

Skeletal muscle mass was assessed on preoperative abdominal computed tomography scans of patients undergoing open aortic aneurysm repair in a retrospective fashion. The skeletal muscle index (SMI) was used to define low muscle mass. Health care costs were obtained for all patients and the relationship between a low SMI and higher costs was explored using linear regression and cross-sectional analysis.

Results

We included 156 patients (81.5% male) with a median age of 72 years undergoing elective surgery for infrarenal abdominal aortic aneurysm in this analysis. The median SMI for patients with low skeletal muscle mass was 53.21 cm2/kg and for patients without, 70.07 cm2/kg. Hospital duration of stay was 2 days longer in patients with low skeletal muscle mass as compared with patients with normal (14 days vs 11 days; P = .001), as was duration of intensive care stay (3 days vs 1 day; P = .01). The median overall hospital costs were €10,460 higher for patients with a low SMI as compared with patients with a normal physical constitution (€53,739 [interquartile range, €45,007-€62,471] vs €43,279 [interquartile range, €39,509-€47,049]; P = .001). After confounder adjustment, a low SMI was associated with a 14.68% cost increase in overall hospital costs, for a cost increase of €6521.

Conclusions

Low skeletal muscle mass is independently associated with higher hospital as well as intensive care costs in patients undergoing elective aortic aneurysm repair. Strategies to reduce this risk factor are warranted for these patients.  相似文献   
6.
7.
8.
ABSTRACT

In this article I explore, for the first time, the relationship between Sowa Rigpa (Tibetan medicine) and global health, tracing “the global” in ethical discourses and pharmaceutical innovation practices of Tibetan medical practitioners. I argue that Sowa Rigpa’s engagement with the world and its global health activities outside China can be understood as a form of “humanitarianism from below,” while its industrialization in China aligns with global health in different ways. In providing new insights into recent developments of Sowa Rigpa, I aim to decenter the notion of humanitarianism and contribute to a broader understanding of global health.  相似文献   
9.
best practice onkologie -  相似文献   
10.
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