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   1282篇
  免费   90篇
  国内免费   18篇
耳鼻咽喉   8篇
儿科学   31篇
妇产科学   33篇
基础医学   149篇
口腔科学   27篇
临床医学   147篇
内科学   293篇
皮肤病学   32篇
神经病学   45篇
特种医学   98篇
外科学   191篇
综合类   83篇
一般理论   1篇
预防医学   107篇
眼科学   16篇
药学   93篇
中国医学   2篇
肿瘤学   34篇
  2018年   8篇
  2017年   8篇
  2016年   11篇
  2015年   8篇
  2014年   12篇
  2013年   26篇
  2012年   7篇
  2011年   11篇
  2010年   27篇
  2009年   26篇
  2008年   13篇
  2007年   19篇
  2006年   10篇
  2005年   9篇
  2001年   10篇
  2000年   8篇
  1999年   18篇
  1998年   25篇
  1997年   34篇
  1996年   39篇
  1995年   27篇
  1994年   34篇
  1993年   42篇
  1992年   21篇
  1991年   20篇
  1990年   26篇
  1989年   28篇
  1988年   32篇
  1987年   31篇
  1986年   22篇
  1985年   20篇
  1984年   15篇
  1983年   17篇
  1982年   15篇
  1981年   16篇
  1980年   11篇
  1979年   11篇
  1978年   9篇
  1977年   15篇
  1976年   9篇
  1963年   16篇
  1959年   49篇
  1958年   95篇
  1957年   86篇
  1956年   67篇
  1955年   67篇
  1954年   52篇
  1949年   51篇
  1948年   61篇
  1947年   7篇
排序方式: 共有1390条查询结果,搜索用时 500 毫秒
1.
The Dundee Memory Clinic was established in 1991. This paper reviews the diagnosis of the first 150 attenders and compares the findings with those of other memory clinics.  相似文献   
2.
3.
4.
5.
6.
7.
8.
Objective To develop and validate a consensus set of retrieval categories for how children remember what they have eaten, and to relate retrieval categories to accuracy of reporting items eaten during school lunch.Design A Delphi technique study was conducted using 10 psychologists. The subject matter consisted of responses transcribed from interviews conducted with 89 randomly selected fourth graders within 90 minutes of eating. Retrieval categories were evaluated for accuracy by comparing students’ self-reported lunch intake with observation.Statistical analyses For round 1, a centroid hierarchical cluster analysis was used to identify common sets of rating pairs to propose categories for reaching consensus. For rounds 2 and 3, percent of agreement was calculated. Accuracy was tabulated across meal items and student use by retrieval category.Results After round 3, we found that 23 “near-consensus”categories were used by at least eight raters. Six categories were used 60% of the time, 4 were used 20% of the time, and 5 were used 15% of the time. Less frequently used categories were combined with similar, more frequently used categories for a total of 16 categories. Students used a large variety of retrieval categories when accurately reporting consumption. Of the 16 categories, 12 were used similarly by both accurate and inaccurate students. Where there were differences in accuracy by retrieval category, the more accurate students used “taste/smell/texture”and “visual”in deference to “order items consumed”and “oral cue still present.”Applications These categories provide insight into the broad range of retrieval categories that children use and provide direction for researchers to design and study specific cues to enhance the accuracy of children's self-reports of diet. J Am Diet Assoc. 1997;97:31–36.  相似文献   
9.
BACKGROUND: To evaluate the results of the tension-free vaginal tape procedure (TVT) from a patient's perspective. METHODS: Between May 1999 and January 2002, 90 patients underwent a TVT for genuine stress incontinence (GSI) and mixed incontinence. Prior to the procedure, GSI was confirmed by clinical examination and urodynamic studies. Results were then audited from patient notes and the same patients were sent questionnaires to examine results from a patient perspective. RESULTS: Overall response rate to the questionnaire was 70 (77%). The mean age of the patients was 50.4 years (range 31-83 years). Sixty-one patients had spinal anesthesia, seven had general anesthesia and two had local anesthesia. Mean hospital stay was 3.36 days (range 2-14 days) and mean period from the operation to the time of the survey and audit was 16.34 months (range 3-28; SD 6.92). Thirty-nine (56%) of the 70 patients who answered said that the operation had cured their incontinence, 16 (23%) had an improvement in their symptoms, 7 (10%) had worsening of their symptoms and 8 (11%) felt that the operation did not make any difference. The overall success rate according to the patients' perspective was 79%, whereas our audit showed an overall success rate of 86% (77% and 82%, respectively, when we compared only the 66 patients who had both notes and replies available for analysis). CONCLUSION: Although a patient's perception regarding the success of TVT tends to differ from that of a clinician, it was not found to be statistically significant (P = 0.22, McNemar test). The TVT is a very successful operation, but realistic cure rates should be offered to patients.  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