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   37617篇
  免费   6411篇
  国内免费   108篇
耳鼻咽喉   233篇
儿科学   1084篇
妇产科学   2145篇
基础医学   2735篇
口腔科学   357篇
临床医学   17780篇
内科学   5239篇
皮肤病学   400篇
神经病学   2694篇
特种医学   686篇
外科学   2545篇
综合类   326篇
一般理论   37篇
预防医学   4370篇
眼科学   373篇
药学   1184篇
中国医学   10篇
肿瘤学   1938篇
  2023年   876篇
  2022年   234篇
  2021年   623篇
  2020年   836篇
  2019年   567篇
  2018年   1501篇
  2017年   1641篇
  2016年   1740篇
  2015年   1887篇
  2014年   2072篇
  2013年   2634篇
  2012年   1632篇
  2011年   1989篇
  2010年   1760篇
  2009年   1913篇
  2008年   1789篇
  2007年   1766篇
  2006年   1807篇
  2005年   1648篇
  2004年   1483篇
  2003年   1372篇
  2002年   1342篇
  2001年   665篇
  2000年   450篇
  1999年   608篇
  1998年   801篇
  1997年   864篇
  1996年   786篇
  1995年   704篇
  1994年   554篇
  1993年   481篇
  1992年   383篇
  1991年   352篇
  1990年   372篇
  1989年   312篇
  1988年   239篇
  1987年   232篇
  1986年   239篇
  1985年   253篇
  1984年   225篇
  1983年   197篇
  1982年   194篇
  1981年   177篇
  1980年   157篇
  1979年   142篇
  1978年   138篇
  1977年   138篇
  1976年   127篇
  1975年   105篇
  1972年   132篇
排序方式: 共有10000条查询结果,搜索用时 453 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.
Maternal and Child Health Journal - Early life exposures can have an impact on a child’s developmental trajectory and children born late preterm (34–36 weeks gestational age)...  相似文献   
3.
Aims: In neuropsychological evaluations, it is often difficult to ascertain whether poor performance on measures of validity is due to poor effort or malingering, or whether there is genuine cognitive impairment. Dunham and Denney created an algorithm to assess this question using the Medical Symptom Validity Test (MSVT). We assessed the ability of their algorithm to detect poor validity versus probable impairment, and concordance of failure on the MSVT with other freestanding tests of performance validity.

Methods: Two previously published datasets (n?=?153 and n?=?641, respectively) from outpatient neuropsychological evaluations were used to test Dunham and Denney’s algorithm, and to assess concordance of failure rates with the Test of Memory Malingering and the forced choice measure of the California Verbal Learning Test, two commonly used performance validity tests.

Results: In both datasets, none of the four cutoff scores for failure on the MSVT (70%, 75%, 80%, or 85%) identified a poor validity group with proportionally aligned failure rates on other freestanding measures of performance validity. Additionally, the protocols with probable impairment did not differ from those with poor validity on cognitive measures.

Conclusions: Despite what appeared to be a promising approach to evaluating failure on the easy MSVT subtests when clinical data are unavailable (as recommended in the advanced interpretation program, or advanced interpretation [AI], of the MSVT), the current findings indicate the AI remains the gold standard for doing so. Future research should build on this effort to address shortcomings in measures of effort in neuropsychological evaluations.  相似文献   

4.
5.
6.
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