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   48884篇
  免费   5561篇
  国内免费   199篇
耳鼻咽喉   520篇
儿科学   1466篇
妇产科学   1055篇
基础医学   5422篇
口腔科学   734篇
临床医学   5548篇
内科学   11348篇
皮肤病学   1016篇
神经病学   5035篇
特种医学   1587篇
外国民族医学   1篇
外科学   8013篇
综合类   666篇
一般理论   34篇
预防医学   4164篇
眼科学   1349篇
药学   3047篇
  1篇
中国医学   59篇
肿瘤学   3579篇
  2023年   906篇
  2022年   189篇
  2021年   998篇
  2020年   898篇
  2019年   894篇
  2018年   1479篇
  2017年   1378篇
  2016年   1334篇
  2015年   1431篇
  2014年   1988篇
  2013年   2452篇
  2012年   3098篇
  2011年   3376篇
  2010年   2153篇
  2009年   2139篇
  2008年   2836篇
  2007年   3020篇
  2006年   2910篇
  2005年   2958篇
  2004年   2641篇
  2003年   2527篇
  2002年   2365篇
  2001年   684篇
  2000年   547篇
  1999年   697篇
  1998年   614篇
  1997年   478篇
  1996年   462篇
  1995年   387篇
  1994年   348篇
  1993年   340篇
  1992年   432篇
  1991年   403篇
  1990年   349篇
  1989年   305篇
  1988年   296篇
  1987年   261篇
  1986年   206篇
  1985年   262篇
  1984年   303篇
  1983年   255篇
  1982年   285篇
  1981年   290篇
  1980年   269篇
  1979年   175篇
  1978年   174篇
  1977年   159篇
  1976年   146篇
  1974年   122篇
  1973年   107篇
排序方式: 共有10000条查询结果,搜索用时 140 毫秒
1.
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   
2.
Cancer Causes & Control - Congenital malformations are strong risk factors for childhood cancer. Our objective was to determine whether cancer survival differs by birth defect status among...  相似文献   
3.
4.
5.
6.
Coronary embolism (CE) is an uncommon and unique cause of acute myocardial infarction. In this report, we review 216 cases of CE including 2 new cases from our institution. The mean patient age was 52.5 years and 62% of the patients were males. Chest pain was the most common presenting symptom followed by dyspnea, and the most commonly affected vessel was the left anterior descending artery. Leading etiologies of the embolus were atrial fibrillation, septic emboli, and iatrogenic causes. Treatment approaches varied with thrombus aspiration being used in 30% of cases. In-hospital mortality rate was 36% and 13% of the cases were complicated by cerebrovascular accident. CE is a unique pathology that leads to acute myocardial infarction. It portends a high mortality rate and requires a high level of suspicion as symptoms may be misleading. Further research is needed in order to improve recognition and management and to lower associated mortality.  相似文献   
7.
8.
9.
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