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   610篇
  免费   33篇
  国内免费   7篇
耳鼻咽喉   4篇
儿科学   36篇
妇产科学   2篇
基础医学   45篇
口腔科学   20篇
临床医学   40篇
内科学   136篇
皮肤病学   8篇
神经病学   18篇
特种医学   79篇
外科学   122篇
综合类   63篇
预防医学   26篇
眼科学   8篇
药学   21篇
肿瘤学   22篇
  2023年   2篇
  2022年   4篇
  2021年   6篇
  2020年   5篇
  2019年   4篇
  2018年   7篇
  2017年   5篇
  2016年   13篇
  2015年   19篇
  2014年   14篇
  2013年   22篇
  2012年   16篇
  2011年   19篇
  2010年   22篇
  2009年   37篇
  2008年   26篇
  2007年   23篇
  2006年   33篇
  2005年   10篇
  2004年   13篇
  2003年   3篇
  2002年   9篇
  2001年   11篇
  2000年   8篇
  1999年   15篇
  1998年   42篇
  1997年   31篇
  1996年   41篇
  1995年   17篇
  1994年   18篇
  1993年   25篇
  1992年   7篇
  1991年   10篇
  1990年   5篇
  1989年   10篇
  1988年   26篇
  1987年   9篇
  1986年   8篇
  1985年   18篇
  1984年   7篇
  1983年   4篇
  1982年   3篇
  1981年   3篇
  1980年   4篇
  1977年   4篇
  1976年   5篇
  1975年   3篇
  1972年   1篇
  1971年   1篇
  1970年   1篇
排序方式: 共有650条查询结果,搜索用时 968 毫秒
1.
The craft of surgery has always relied on the use of instruments. Innovations in surgery have paralleled innovations in instrumentation. Advances in surgical instrumentation continue today and have enabled huge strides in surgical procedures and outcomes during this generation. Computers and related technology are now changing the interface between the surgeon and the patient, and are poised to improve patient outcomes by enhancing the surgeon’s skills and training. The application of computer enhanced telemanipulators, or “robots”, may specifically enhance operations, for example Heller myotomy, that require good visualization and precise careful dissection of delicate structures. This review covers the pathophysiology of achalasia and its history of medical and surgical treatment, leading to modern robotic telesurgical approaches. Improvements in outcome from medical to standard surgical to robotic telesurgical approaches are discussed. Current operative technique for robotic telesurgical treatment of achalasia is described and the authors conclude with a glimpse of where, in the future, current research endeavors will lead us in the treatment of achalasia.  相似文献   
2.
3.
4.
5.
6.
7.
8.
9.
Preliminary data have suggested that female infertility due to corpus luteum insufficiency may be caused by subclinical hypothyroidism [exaggerated thyroid-stimulating hormone (TSH) response to thyrotrophin- releasing hormone (TRH) stimulation]. L-Thyroxine supplementation has been recommended to achieve pregnancies in subclinical hypothyroid women. This controlled study was carried out in order to investigate the biochemical diagnosis of subclinical hypothyroidism as a possible infertility factor. Five infertile patients (aged 25-36 years) with subclinical hypothyroidism (n = 4, stimulated TSH >20 microU/ml) or primary hypothyroidism (n = 1) and five healthy controls (aged 22-39 years) with normal thyroid function (stimulated TSH <15 microU/ml), regular cycles and no history of infertility were studied in the early follicular phase. In the pre-study evaluation, eight of 23 volunteers (34.8%) had to be excluded because of subclinical hypothyroidism with stimulated TSH values (TSHs) >15 microU/ml. Cycle function of patients and controls was compared by the method of LH pulse pattern analysis. Therefore blood samples were drawn every 10 min during a 24 h period. Sleep was recorded from midnight to 7 a.m. Repetition of the TRH tests at the end of the 24 h blood sampling period confirmed the difference in stimulated TSH values of the two study groups. Pulse analysis for luteinizing hormone (LH), TSH and prolactin showed no differences between patients and controls for pulse frequency, amplitude, height, length, area under curve (AUC) and the 24 h mean. Even the hypothyroid patient had a normal LH pulse pattern. Additional measurement of melatonin in pooled sera every 30 min gave the well-documented diurnal profiles during day and night for both groups. Patients had significantly higher melatonin values at seven time points during the night. Peaks for LH, TSH, prolactin and cortisol were correlated with the sleep stages wake, rapid eye movement, 1 + 2 and 3 + 4. We concluded that corpus luteum insufficiency in female infertility cannot be explained by subclinical hypothyroidism and thus should not be treated with L-thyroxine for fertility reasons.   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