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   80721篇
  免费   6102篇
  国内免费   169篇
耳鼻咽喉   1054篇
儿科学   2306篇
妇产科学   1888篇
基础医学   13547篇
口腔科学   1941篇
临床医学   7408篇
内科学   16106篇
皮肤病学   1236篇
神经病学   7617篇
特种医学   3329篇
外国民族医学   46篇
外科学   10092篇
综合类   586篇
一般理论   89篇
预防医学   6966篇
眼科学   1495篇
药学   5817篇
中国医学   190篇
肿瘤学   5279篇
  2022年   502篇
  2021年   1345篇
  2020年   878篇
  2019年   1209篇
  2018年   1513篇
  2017年   1107篇
  2016年   1270篇
  2015年   1516篇
  2014年   1907篇
  2013年   3049篇
  2012年   4089篇
  2011年   4206篇
  2010年   2751篇
  2009年   2435篇
  2008年   3724篇
  2007年   3930篇
  2006年   3862篇
  2005年   3681篇
  2004年   3577篇
  2003年   3338篇
  2002年   3276篇
  2001年   2733篇
  2000年   2780篇
  1999年   2493篇
  1998年   1098篇
  1997年   912篇
  1996年   835篇
  1995年   834篇
  1994年   703篇
  1993年   746篇
  1992年   1772篇
  1991年   1684篇
  1990年   1630篇
  1989年   1608篇
  1988年   1343篇
  1987年   1309篇
  1986年   1234篇
  1985年   1150篇
  1984年   821篇
  1983年   752篇
  1982年   517篇
  1981年   506篇
  1980年   421篇
  1979年   695篇
  1978年   417篇
  1977年   398篇
  1975年   414篇
  1974年   470篇
  1973年   388篇
  1972年   378篇
排序方式: 共有10000条查询结果,搜索用时 774 毫秒
1.
2.
3.
4.
5.
6.
7.
8.

Background

Early dumping is a poorly defined and incompletely understood complication after Roux-en-Y gastric (RYGB).

Objective

We performed a mixed-meal tolerance test in patients after RYGB to address the prevalence of early dumping and to gain further insight into its pathophysiology.

Setting

The study was conducted in a regional hospital in the northern part of the Netherlands.

Methods

From a random sample of patients who underwent primary RYGB between 2008 and 2011, 46 patients completed the mixed-meal tolerance test. The dumping severity score for early dumping was assessed every 30 minutes. A sum score at 30 or 60 minutes of ≥5 and an incremental score of ≥3 points were defined as indicating a high suspicion of early dumping. Blood samples were collected at baseline, every 10 minutes during the first half hour, and at 60 minutes after the start.

Results

The prevalence of a high suspicion of early dumping was 26%. No differences were seen for absolute hematocrit value, inactive glucagon-like peptide-1, and vasoactive intestinal peptide between patients with or without early dumping. Patients at high suspicion of early dumping had higher levels of active glucagon-like peptide-1 and peptide YY.

Conclusion

The prevalence of complaints at high suspicion of early dumping in a random population of patients after RYGB is 26% in response to a mixed-meal tolerance test. Postprandial increases in both glucagon-like peptide-1 and peptide YY are associated with symptoms of early dumping, suggesting gut L-cell overactivity in this syndrome.  相似文献   
9.
Clinical Oral Investigations - The aim of this study was the analysis of WNT10A variants in seven families of probands with various forms of tooth agenesis and self-reported family history of...  相似文献   
10.
The aim of this study was to analyse the effect of body mass index (BMI), both low and high values, on the perioperative complication rate in patients with oral squamous cell carcinoma (OSCC). The medical records of 259 patients operated between 2014 and 2017 for OSCC were reviewed. Univariate and multivariate analyses were performed. Sixty of the 259 patients developed 87 complications. Low or high BMI was not associated with the perioperative complication rate. A longer operating time and increased blood loss were associated with a higher perioperative complication rate and higher Clavien–Dindo grade. Low BMI, American Society of Anesthesiologists score 2 and 3, a longer operating time, and increased blood loss were associated with a longer hospital stay. Low BMI was associated with a longer hospital stay. Neither low nor high BMI was associated with the perioperative complication rate. A longer operating time and increased blood loss were associated with a higher perioperative complication rate and higher Clavien–Dindo grade.  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