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   5346篇
  免费   400篇
  国内免费   9篇
耳鼻咽喉   60篇
儿科学   215篇
妇产科学   174篇
基础医学   668篇
口腔科学   73篇
临床医学   824篇
内科学   934篇
皮肤病学   135篇
神经病学   452篇
特种医学   121篇
外科学   588篇
综合类   38篇
一般理论   5篇
预防医学   504篇
眼科学   156篇
药学   396篇
  1篇
中国医学   23篇
肿瘤学   388篇
  2024年   3篇
  2023年   69篇
  2022年   45篇
  2021年   182篇
  2020年   124篇
  2019年   185篇
  2018年   221篇
  2017年   156篇
  2016年   174篇
  2015年   163篇
  2014年   201篇
  2013年   300篇
  2012年   423篇
  2011年   477篇
  2010年   219篇
  2009年   252篇
  2008年   366篇
  2007年   425篇
  2006年   335篇
  2005年   344篇
  2004年   266篇
  2003年   274篇
  2002年   225篇
  2001年   36篇
  2000年   23篇
  1999年   31篇
  1998年   30篇
  1997年   17篇
  1996年   17篇
  1995年   17篇
  1994年   13篇
  1993年   13篇
  1992年   6篇
  1991年   11篇
  1990年   5篇
  1989年   24篇
  1988年   10篇
  1986年   4篇
  1985年   7篇
  1984年   11篇
  1983年   5篇
  1982年   7篇
  1981年   5篇
  1980年   7篇
  1979年   5篇
  1978年   2篇
  1977年   3篇
  1976年   2篇
  1970年   2篇
  1968年   3篇
排序方式: 共有5755条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.

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   
5.
Brain Imaging and Behavior - The purpose of this study was to investigate whether long-term television viewing patterns, a common sedentary behavior, in early to mid-adulthood is associated with...  相似文献   
6.
7.
8.
People with mental illness may be unable to provide critical input about the care they wish to receive during a psychiatric crisis because of altered mental states. It is therefore imperative that clinicians seek to understand service users' wishes for care while they are well and able to provide meaningful input into the discussion. Achieving such an end may be done by discussing and completing a psychiatric advance directive. However, very few Asian countries have legislation that supports such advance directives. The present article seeks to give physicians more information about advance psychiatric directives and the potential role they could play to improve the healthcare provided in Asia to people at risk of losing capacity due to a mental illness. The degree to which mental health legislation supports psychiatric advance directives is documented for each country of South East Asia and Eastern Asia.  相似文献   
9.
Renal cell carcinomas (RCC) make up about 90% of kidney cancers, of which 80% are of the clear cell subtype. About 20% of patients are already metastatic at the time of diagnosis. Initial treatment is often cytoreductive nephrectomy, but systemic therapy is required for advanced RCC. Single agent targeted therapies are moderately toxic and only somewhat effective, leading to development of immunotherapies and combination therapies. This review identifies limitations of monotherapies for metastatic renal cell carcinoma, discusses recent advances in combination therapies, and highlights therapeutic options under development. The goal behind combining various modalities of systemic therapy is to potentiate a synergistic antitumor effect. However, combining targeted therapies may cause increased toxicity. The initial attempts to create therapeutic combinations based on inhibition of the vascular endothelial growth factor or mammalian target of rapamycin pathways were largely unsuccessful in achieving a profile of increased synergy without increased toxicity. To date, five combination therapies have been approved by the U.S. Food and Drug Administration, with the most recently approved therapies being a combination of checkpoint inhibition plus targeted therapy. Several other combination therapies are under development, including some in the phase 3 stage. The new wave of combination therapies for metastatic RCC has the potential to increase response rates and improve survival outcomes while maintaining tolerable side effect profiles.  相似文献   
10.
Psychiatric Quarterly - As a public health emergency, a pandemic increases susceptibility to unfavourable psychological outcomes. The aim of the present study was to investigate the buffering role...  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