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   3870篇
  免费   608篇
  国内免费   14篇
耳鼻咽喉   16篇
儿科学   153篇
妇产科学   204篇
基础医学   281篇
口腔科学   34篇
临床医学   1227篇
内科学   707篇
皮肤病学   113篇
神经病学   324篇
特种医学   108篇
外国民族医学   1篇
外科学   545篇
综合类   84篇
一般理论   2篇
预防医学   304篇
眼科学   73篇
药学   127篇
中国医学   13篇
肿瘤学   176篇
  2024年   10篇
  2023年   74篇
  2022年   18篇
  2021年   108篇
  2020年   66篇
  2019年   77篇
  2018年   170篇
  2017年   166篇
  2016年   165篇
  2015年   156篇
  2014年   181篇
  2013年   211篇
  2012年   227篇
  2011年   214篇
  2010年   140篇
  2009年   190篇
  2008年   183篇
  2007年   195篇
  2006年   160篇
  2005年   153篇
  2004年   135篇
  2003年   104篇
  2002年   91篇
  2001年   111篇
  2000年   100篇
  1999年   105篇
  1998年   67篇
  1997年   99篇
  1996年   76篇
  1995年   69篇
  1994年   69篇
  1993年   54篇
  1992年   69篇
  1991年   44篇
  1990年   69篇
  1989年   55篇
  1988年   43篇
  1987年   32篇
  1986年   29篇
  1985年   25篇
  1984年   26篇
  1983年   15篇
  1982年   16篇
  1981年   18篇
  1980年   13篇
  1979年   17篇
  1977年   14篇
  1976年   17篇
  1975年   10篇
  1973年   7篇
排序方式: 共有4492条查询结果,搜索用时 406 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.
7.
MR compatibility of Guglielmi detachable coils   总被引:6,自引:0,他引:6  
  相似文献   
8.
Seventy-four 8th- and 10th-grade students attending a private girls' school in Hawaii were queried about their perceptions of and preparation for menstruation using a questionnaire administered in a health education class. Eighty percent had already started menstruating. The most frequently cited perceptions by the respondents referred to both the inconveniences and the normalcy of menstruation. Many were first informed about menstruation by their mothers and stated that they also first informed their mothers when they started menstruating. Surprise, fear, and embarrassment were common initial reactions, while strong negative or positive emotions were more rare. Only 35% wanted boys and girls together during class discussion, but 89% stated that boys needed to be informed about menstruation. The most frequent reasons cited for noncoed settings were the girls' concern about their comfort in openly discussing menstruation. Thirty-eight percent thought parents should inform other siblings when they started menstruation, although almost half gave specific conditions the parents should consider. The majority thought the fifth to sixth grades were the best times to introduce menstruation content.  相似文献   
9.
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   
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