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   303980篇
  免费   42305篇
  国内免费   3055篇
耳鼻咽喉   6434篇
儿科学   9216篇
妇产科学   5334篇
基础医学   24344篇
口腔科学   4969篇
临床医学   41339篇
内科学   79957篇
皮肤病学   10337篇
神经病学   29690篇
特种医学   12435篇
外国民族医学   6篇
外科学   63609篇
综合类   2242篇
现状与发展   74篇
一般理论   141篇
预防医学   18475篇
眼科学   6759篇
药学   11835篇
  1篇
中国医学   253篇
肿瘤学   21890篇
  2024年   562篇
  2023年   5373篇
  2022年   2374篇
  2021年   5864篇
  2020年   7827篇
  2019年   5008篇
  2018年   10650篇
  2017年   9767篇
  2016年   11232篇
  2015年   11673篇
  2014年   20172篇
  2013年   22117篇
  2012年   16032篇
  2011年   16683篇
  2010年   16514篇
  2009年   19901篇
  2008年   15971篇
  2007年   15039篇
  2006年   16866篇
  2005年   14459篇
  2004年   13166篇
  2003年   11639篇
  2002年   11148篇
  2001年   5425篇
  2000年   4348篇
  1999年   4927篇
  1998年   5722篇
  1997年   5032篇
  1996年   4731篇
  1995年   4434篇
  1994年   3079篇
  1993年   2672篇
  1992年   2262篇
  1991年   2299篇
  1990年   1840篇
  1989年   1903篇
  1988年   1733篇
  1987年   1552篇
  1986年   1542篇
  1985年   1385篇
  1984年   1266篇
  1983年   1172篇
  1982年   1321篇
  1981年   1149篇
  1980年   1021篇
  1979年   804篇
  1978年   782篇
  1977年   870篇
  1976年   640篇
  1975年   630篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
12.
13.
14.
15.
16.
17.
18.
Two Janus-associated kinase inhibitors (JAKi) (initially ruxolitinib and, more recently, fedratinib) have been approved as treatment options for patients who have intermediate-risk and high-risk myelofibrosis (MF), with pivotal trials demonstrating improvements in spleen volume, disease symptoms, and quality of life. At the same time, however, clinical trial experiences with JAKi agents in MF have demonstrated a high frequency of discontinuations because of adverse events or progressive disease. In addition, overall survival benefits and clinical and molecular predictors of response have not been established in this population, for which the disease burden is high and treatment options are limited. Consistently poor outcomes have been documented after JAKi discontinuation, with survival durations after ruxolitinib ranging from 11 to 16 months across several studies. To address such a high unmet therapeutic need, various non-JAKi agents are being actively explored (in combination with ruxolitinib in first-line or salvage settings and/or as monotherapy in JAKi-pretreated patients) in phase 3 clinical trials, including pelabresib (a bromodomain and extraterminal domain inhibitor), navitoclax (a B-cell lymphoma 2/B-cell lymphoma 2-xL inhibitor), parsaclisib (a phosphoinositide 3-kinase inhibitor), navtemadlin (formerly KRT-232; a murine double-minute chromosome 2 inhibitor), and imetelstat (a telomerase inhibitor). The breadth of data expected from these trials will provide insight into the ability of non-JAKi treatments to modify the natural history of MF.  相似文献   
19.
Patient navigation is a strategy for overcoming barriers to reduce disparities and to improve access and outcomes. The aim of this umbrella review was to identify, critically appraise, synthesize, and present the best available evidence to inform policy and planning regarding patient navigation across the cancer continuum. Systematic reviews examining navigation in cancer care were identified in the Cochrane Central Register of Controlled Trials (CENTRAL), PubMed, Embase, Cumulative Index of Nursing and Allied Health (CINAHL), Epistemonikos, and Prospective Register of Systematic Reviews (PROSPERO) databases and in the gray literature from January 1, 2012, to April 19, 2022. Data were screened, extracted, and appraised independently by two authors. The JBI Critical Appraisal Checklist for Systematic Review and Research Syntheses was used for quality appraisal. Emerging literature up to May 25, 2022, was also explored to capture primary research published beyond the coverage of included systematic reviews. Of the 2062 unique records identified, 61 systematic reviews were included. Fifty-four reviews were quantitative or mixed-methods reviews, reporting on the effectiveness of cancer patient navigation, including 12 reviews reporting costs or cost-effectiveness outcomes. Seven qualitative reviews explored navigation needs, barriers, and experiences. In addition, 53 primary studies published since 2021 were included. Patient navigation is effective in improving participation in cancer screening and reducing the time from screening to diagnosis and from diagnosis to treatment initiation. Emerging evidence suggests that patient navigation improves quality of life and patient satisfaction with care in the survivorship phase and reduces hospital readmission in the active treatment and survivorship care phases. Palliative care data were extremely limited. Economic evaluations from the United States suggest the potential cost-effectiveness of navigation in screening programs.  相似文献   
20.
Bundesgesundheitsblatt - Gesundheitsforschung - Gesundheitsschutz - Akteure der öffentlichen Gesundheit (Public Health) tragen wesentlich zu Gesundheitsschutz, -förderung und...  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