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   2255篇
  免费   357篇
  国内免费   39篇
耳鼻咽喉   15篇
儿科学   176篇
妇产科学   30篇
基础医学   136篇
口腔科学   29篇
临床医学   359篇
内科学   659篇
皮肤病学   65篇
神经病学   231篇
特种医学   280篇
外科学   288篇
综合类   65篇
预防医学   121篇
眼科学   18篇
药学   108篇
中国医学   1篇
肿瘤学   70篇
  2023年   53篇
  2022年   12篇
  2021年   37篇
  2020年   98篇
  2019年   22篇
  2018年   98篇
  2017年   74篇
  2016年   74篇
  2015年   66篇
  2014年   105篇
  2013年   119篇
  2012年   65篇
  2011年   56篇
  2010年   90篇
  2009年   130篇
  2008年   78篇
  2007年   78篇
  2006年   72篇
  2005年   54篇
  2004年   39篇
  2003年   29篇
  2002年   36篇
  2001年   41篇
  2000年   32篇
  1999年   49篇
  1998年   94篇
  1997年   102篇
  1996年   83篇
  1995年   72篇
  1994年   51篇
  1993年   57篇
  1992年   35篇
  1991年   25篇
  1990年   35篇
  1989年   62篇
  1988年   52篇
  1987年   39篇
  1986年   40篇
  1985年   43篇
  1984年   28篇
  1983年   24篇
  1982年   22篇
  1981年   18篇
  1980年   15篇
  1979年   16篇
  1978年   12篇
  1977年   11篇
  1976年   10篇
  1974年   10篇
  1971年   10篇
排序方式: 共有2651条查询结果,搜索用时 15 毫秒
1.
2.
For 50 years now, sacrospinous ligament fixation (SSLF) has been used to treat pelvic organ prolapse consequent on altered integrity of the pelvic myofascial structures. It is usually performed vaginally, but it has recently been performed laparoscopically through either an anterior or a posterior approach, with the broad ligament as a landmark to differentiate the two. In the present study, these two laparoscopic approaches were assessed using Thiel-embalmed cadavers. The anterior and posterior approaches were compared in terms of the closest distance to anatomical structures at risk, including pelvic viscera, the obturator nerve, and vascular structures. The posterior approach was more often closer to the investigated vessels and the rectum. The obturator nerve and the ureter were close to both the anterior and posterior approaches. The urinary bladder was closer using the anterior approach. From an anatomical standpoint, therefore, the anterior laparoscopic approach for SSLF is more likely to cause injury to the urinary bladder, whereas the posterior approach is more prone to causing rectal and vessel injuries. This study illustrates, from a basic science perspective, the importance of combining fascia research, novel endoscopic or minimally invasive surgical exposures informed by anatomy, and contemporary trends in gynecology in order to improve patient outcomes. Clin. Anat. 33:522–529, 2020. © 2019 Wiley Periodicals, Inc.  相似文献   
3.
4.
5.
6.
Sixty children aged 5-13 years with moderately severe asthma took part in a double-blind, placebo-controlled trial of ketotifen. The design incorporated a 22 week study period, the addition of ketotifen or placebo to the current medication, and a controlled withdrawal of the regular therapy. Children receiving ketotifen showed significantly lower mean numbers of asthma attacks and less absence from school. The addition of ketotifen to existing treatment was associated with marginally significant changes in rates of day and night wheezing. In the second phase of study, additional therapy was withdrawn from both the ketotifen and placebo groups which resulted in a high (percentage) withdrawal. Children receiving ketotifen did not have a significantly lower failure rate than those given placebo.  相似文献   
7.
8.
9.
The relationship between panic attacks and chemical dependencies   总被引:1,自引:0,他引:1  
The purposes of the present study were to (a) determine the prevalence and characteristics of panic attacks in an alcohol/drug abuse inpatient population, (b) compare patients who reported experiencing panic attacks to patients who have never experienced a panic attack on various self-report measures of psychopathology and on ratings completed by Caregivers, and (c) to examine differences within groups of panickers. One hundred forty-four patients completed the questionnaires over a 17 week period. Over 50% of the patients reported experiencing one or more attacks in the three weeks prior to testing. These panickers scored higher than non-panickers on various measures of psychopathology. Over 83% of panickers reported using alcohol to self-medicate their panic attacks with almost 72% of them believing this procedure to be effective for preventing or reducing panic attacks. Male panickers differed from female panickers on several measures as did panickers who reported their panic attacks began before the alcohol abuse compared to those who did not believe this. The mean history of panic attacks was 103.4 months while the mean history of alcohol abuse was 134.6 months.  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