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   378篇
  免费   21篇
  国内免费   12篇
儿科学   40篇
妇产科学   3篇
基础医学   22篇
口腔科学   11篇
临床医学   41篇
内科学   104篇
皮肤病学   5篇
神经病学   9篇
特种医学   70篇
外科学   22篇
综合类   16篇
预防医学   12篇
药学   36篇
肿瘤学   20篇
  2023年   1篇
  2022年   1篇
  2020年   3篇
  2019年   5篇
  2018年   8篇
  2017年   9篇
  2016年   2篇
  2015年   7篇
  2014年   12篇
  2013年   18篇
  2012年   17篇
  2011年   6篇
  2010年   24篇
  2009年   17篇
  2008年   9篇
  2007年   9篇
  2006年   12篇
  2005年   9篇
  2004年   7篇
  2003年   17篇
  2002年   2篇
  2001年   6篇
  2000年   9篇
  1999年   14篇
  1998年   29篇
  1997年   19篇
  1996年   21篇
  1995年   17篇
  1994年   16篇
  1993年   13篇
  1992年   5篇
  1991年   2篇
  1990年   6篇
  1989年   8篇
  1988年   5篇
  1987年   7篇
  1986年   8篇
  1985年   5篇
  1984年   4篇
  1983年   4篇
  1982年   3篇
  1981年   4篇
  1980年   1篇
  1979年   3篇
  1977年   3篇
  1976年   2篇
  1975年   1篇
  1950年   1篇
排序方式: 共有411条查询结果,搜索用时 31 毫秒
51.
52.
53.
我非常高兴向大家推荐这份发展中国家幽门螺杆菌(H.priori)临床指南。该指南的编译是由数位在该领域具有丰富临床经验的世界知名专家共同完成的。  相似文献   
54.
55.

INTRODUCTION

The preliminary results of a pyrocarbon interpositional radiocarpal implant in a small cohort of patients were reviewed. As it is currently only a limited release product, we describe to potential users early complications and negative outcomes.

METHODS

Patients were assessed using pain levels, ranges of motion, grip strength, type of and time to return to work as well as pre-operative and post-operative DASH (Disabilities of the Arm, Shoulder and Hand) scores. Radiographs were taken and patient satisfaction was recorded.

RESULTS

All six patients were contacted. One was not satisfied. Three had reduced motion. None experienced squeaking. There were no immediate or late post-operative complications. There was one early volar displacement of an implant.

CONCLUSIONS

Although our early results are somewhat encouraging, further and longer studies are warranted before supporting the use of this particular pyrocarbon implant as a primary procedure.  相似文献   
56.
Little is known about the relationship between homeworking and mental health during the Covid-19 pandemic and how it might differ by keyworker status. To understand this relationship, we use longitudinal data collected over three time points during the pandemic from three British cohort studies born in 1958 (National Child Development Study), 1970 (British Cohort Study) and 1989–90 (Next Step) as well as from a population-based study stratified by four age groups (Understanding Society). We estimate the association between life satisfaction, anxiety, depression, and psychological distress and homeworking by key worker status using mixed effects models with maximum likelihood estimation to account for repeated measurements across the pandemic, allowing intercepts to vary across individuals after controlling for a set of covariates including pre-pandemic home working propensities and loneliness. Results show that key workers working from home showed the greatest decline in mental health outcomes relative to other groups. Pre-pandemic homeworking did not significantly change the nature of such a relationship and loneliness slightly attenuated some of the effects. Finally, mental health outcomes varied across age-groups and time points. The discussion emphasises the need to pay attention to key workers when assessing the relationship between mental health and homeworking.  相似文献   
57.
58.
OBJECTIVE: To evaluate the accuracy of a rapid assay that wasdeveloped to detect Helicobacter pylori antigen in the stool,using the principle of immunochromatography, in the Chinese population. METHODS: Eligible patients without prior treatment of H.pylori were recruited. An in‐house rapid urease test (RUT) andhistology were used as the gold standard. The results of the rapidstool antigen test were compared with the gold standard. RESULTS: Valid rapid stool antigen test results for interpretationwere obtained from 94 consecutive patients (mean age: 52.5, range:22?82 years). Sensitivity, specificity, positive predictivevalue, negative predictive value and accuracy were, respectively, 77.5%,87.0%, 81.6%, 83.9% and 83.0%.The test was easy to perform and results were available within 15 min. CONCLUSION: The rapid stool antigen test using immunochromatography accuratelydiagnoses H. pylori infection in Chinese patients.  相似文献   
59.
60.
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