首页 | 官方网站   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   5621篇
  免费   516篇
  国内免费   18篇
医药卫生   6155篇
  2023年   82篇
  2022年   48篇
  2021年   254篇
  2020年   179篇
  2019年   239篇
  2018年   258篇
  2017年   176篇
  2016年   171篇
  2015年   194篇
  2014年   267篇
  2013年   336篇
  2012年   477篇
  2011年   467篇
  2010年   229篇
  2009年   208篇
  2008年   316篇
  2007年   330篇
  2006年   277篇
  2005年   288篇
  2004年   232篇
  2003年   180篇
  2002年   170篇
  2001年   88篇
  2000年   88篇
  1999年   73篇
  1998年   42篇
  1997年   45篇
  1996年   27篇
  1995年   22篇
  1994年   35篇
  1993年   26篇
  1992年   43篇
  1991年   25篇
  1990年   41篇
  1989年   36篇
  1988年   30篇
  1987年   19篇
  1986年   19篇
  1985年   16篇
  1984年   17篇
  1983年   7篇
  1982年   7篇
  1981年   8篇
  1980年   8篇
  1979年   10篇
  1977年   8篇
  1976年   8篇
  1973年   6篇
  1969年   4篇
  1966年   3篇
排序方式: 共有6155条查询结果,搜索用时 296 毫秒
1.
2.
3.
4.
5.
Purpose

Robotic approaches have been steadily replacing laparoscopic approaches in metabolic and bariatric surgeries (MBS); however, their superiority has not been rigorously evaluated. The main goal of the study was to evaluate the 5-year utilization trends of robotic MBS and to compare to laparoscopic outcomes.

Methods

Retrospective analysis of 2015–2019 MBSAQIP data. Kruskal-Wallis test/Wilcoxon and Fisher’s exact/chi-square were used to compare continuous and categorical variables, respectively. Generalized linear models were used to compare surgery outcomes.

Results

The use of robotic MBS increased from 6.2% in 2015 to 13.5% in 2019 (N= 775,258). Robotic MBS patients had significantly higher age, BMI, and likelihood of 12 diseases compared to laparoscopic patients. After adjustment, robotic MBS patients showed higher 30-day interventions and 30-day readmissions alongside longer surgery time (26–38 min).

Conclusion

Robotic MBS shows higher intervention and readmission even after controlling for cofounding variables.

Graphical Abstract
  相似文献   
6.
Castrated or sham-operated male athymic mice were inoculated with cells from the human hepatocellular carcinoma cell line PLC/PRF/5. There were no significant differences between the two groups with respect to the number of animals developing tumors, the time to tumor development, or the subsequent rate of increase in either tumor base area or mouse serum alpha-fetoprotein concentration. Androgen receptors were assayed in nuclei obtained from three separate liver cancer cell lines and from normal adult human liver. Similar concentrations, ranging from 235 to 550 fmol/mg DNA, of nuclear androgen receptors were detected in all tissues. Low percentages of androgen receptors were retained on DNA-cellulose. Although the presence of receptors implies the potential for metabolic effects of androgens in normal and malignant liver, our in vivostudies suggest that castration does not alter significantly the growth of liver cancer xenografts in athymic mice.  相似文献   
7.
8.
Acquired supravalvar membranous stenosis of the left atrioventricular valve   总被引:1,自引:0,他引:1  
Acquired supravalvar membranous stenosis of the left atrioventricular valve developed in a nine year old boy with atrioventricular discordance. The supravalvar membrane had not been present when a partial annuloplasty was performed on the left atrioventricular valve eight years before. The stenosis was relieved by operative excision of the membrane.  相似文献   
9.
10.
There is a dearth of research examining treatment engagement and attendance among runaway youth and their families. Such research is needed in order to inform treatment providers on factors associated with engagement and maintenance of these difficult to engage families into counseling. This study examined differential treatment attendance for alcohol abusing runaway youth residing at a local shelter. A traditional office-based family systems approach, Functional Family Therapy (FFT), was compared to a non-traditional, home-based, multi-systemic family therapy approach, Ecologically Based Family Therapy (EBFT). As expected, treatment engagement and attendance was significantly higher for those assigned to EBFT (N = 37) compared to FFT (N = 40). Predictors of treatment attendance (income, family chaos, externalization problems and level of youth substance use) were examined within each treatment modality. Findings suggest that home-based (compared to office-based) treatment modalities may significantly increase treatment attendance and engagement of runaway youth and their families. Non-traditional forms of treatment may need to be considered in order to best meet the needs of highly chaotic and disorganized family systems.  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-23

京公网安备 11010802026262号