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   440178篇
  免费   28490篇
  国内免费   2914篇
耳鼻咽喉   6175篇
儿科学   10608篇
妇产科学   12005篇
基础医学   61252篇
口腔科学   14588篇
临床医学   35607篇
内科学   89286篇
皮肤病学   9624篇
神经病学   32767篇
特种医学   16102篇
外国民族医学   83篇
外科学   69744篇
综合类   10229篇
现状与发展   1篇
一般理论   75篇
预防医学   22834篇
眼科学   10668篇
药学   35188篇
  1篇
中国医学   2327篇
肿瘤学   32418篇
  2021年   3565篇
  2019年   3757篇
  2018年   6012篇
  2017年   4662篇
  2016年   4927篇
  2015年   5413篇
  2014年   7389篇
  2013年   10005篇
  2012年   13227篇
  2011年   13565篇
  2010年   8173篇
  2009年   7520篇
  2008年   11979篇
  2007年   13128篇
  2006年   12850篇
  2005年   11982篇
  2004年   11248篇
  2003年   10860篇
  2002年   10360篇
  2001年   29938篇
  2000年   30447篇
  1999年   25162篇
  1998年   5740篇
  1997年   4736篇
  1996年   4269篇
  1995年   3890篇
  1994年   3480篇
  1993年   3164篇
  1992年   17143篇
  1991年   15829篇
  1990年   15231篇
  1989年   15005篇
  1988年   13557篇
  1987年   13006篇
  1986年   12003篇
  1985年   11184篇
  1984年   7647篇
  1983年   6177篇
  1982年   3080篇
  1979年   6074篇
  1978年   3769篇
  1977年   3318篇
  1975年   3032篇
  1974年   3511篇
  1973年   3291篇
  1972年   3241篇
  1971年   3146篇
  1970年   2850篇
  1969年   2885篇
  1968年   2585篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
Abstract

Purpose: We examined underlying psychosocial processes of a behavioral treatment for urinary incontinence (UI) of prostate cancer survivors.

Design: Secondary analysis of data collected from a clinical trial.

Sample: Two hundred forty-four prostate cancer survivors who participated in a clinical trial of behavioral intervention to UI as intervention or control subjects.

Methods: The participants had a 3-month behavioral intervention or usual care and were followed up for an additional 3?months. They were assessed at baseline, 3, and 6?months. Latent growth curve models were performed to examine trajectories of each study variable and relationships among the variables.

Findings: Increasing self-efficacy and social support were significantly and independently associated with more reduction of urinary leakage frequency over time.

Implications for psychosocial oncology: Providing problem-solving skills and social support, including peer support, are essential for empowering patients to reduce UI.  相似文献   
92.
93.
94.
95.
96.
97.
98.
This paper describes a study to capture the key roles and activities of nephrology nurses across different countries in Europe. The concept of the study and the need to clarify the activities of the nephrology nurse arose as part of a larger study to develop the European Practice Database (EPD) (1). The Research Board (EDTNA/ERCA) needed to identify key questions that would detect significant differences in the role and responsibilities of nephrology nurses in different countries and monitor the evolution over time of nephrology nursing practice in Europe. It was therefore appropriate to devise a separate small study to generate evidence based questions for the EPD and confirm the reliability and usefulness of the information captured.  相似文献   
99.
Conclusion  Several quality-control measures take place before (patient and camera preparation) and during SPECT acquisition to achieve high-quality images. Not uncommonly, technologists and physicians are left with suboptimal images that have to be addressed to reach the “right answer” for patient diagnosis and hence management. In many cases patients may be reimaged, especially if the problem is detected early, but in other cases either the patient has left the nuclear laboratory or there is an inevitable problem that, even with reimaging, will not be resolved. In these situations the technologist and physician have to seek the available techniques to obtain the best images possible. These resources are discussed in this issue as an aid in quality control to obtain the best possible images.  相似文献   
100.
Salvage of a failed valgus osteotomy for nonunion of an unstable pertrochanteric fracture is reported. A valgus intertrochanteric osteotomy was performed for a failed sliding hip screw fixation of an unstable pertrochanteric fracture at another institution. Four months following osteotomy, the fracture was still un-united with two distal screws of the hip plate broken and a coxa vara deformity. Reconstruction was performed with a nine-hole 95° angle blade plate and cancellous bone graft, because the insufficient fixation of the distal fragment was considered to be the main reason for failure. The osteotomy was healed at six months post-surgery and the patient reported complete resolution of symptoms. Intertrochanteric valgus osteotomy is an effective procedure for mal-union and non-union of pertrochanteric fracture but stable fixation is required for a good result. The blade of the angle plate offers good purchase of the proximal fragment and secures it under rotational and bending stresses. We recommend that distal fragments should be fixed with at least seven cortices for this type of osteotomy.  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