首页 | 官方网站   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   2582507篇
  免费   189898篇
  国内免费   7599篇
医药卫生   2780004篇
  2019年   20874篇
  2018年   29586篇
  2017年   22823篇
  2016年   26527篇
  2015年   29812篇
  2014年   40815篇
  2013年   60947篇
  2012年   81047篇
  2011年   85434篇
  2010年   51537篇
  2009年   49597篇
  2008年   79836篇
  2007年   84751篇
  2006年   86516篇
  2005年   82620篇
  2004年   79595篇
  2003年   76761篇
  2002年   73925篇
  2001年   128597篇
  2000年   131422篇
  1999年   110149篇
  1998年   29798篇
  1997年   26340篇
  1996年   26569篇
  1995年   27331篇
  1994年   25026篇
  1993年   23368篇
  1992年   85305篇
  1991年   81771篇
  1990年   78957篇
  1989年   76210篇
  1988年   69600篇
  1987年   68133篇
  1986年   63704篇
  1985年   60665篇
  1984年   44993篇
  1983年   37947篇
  1982年   22414篇
  1981年   19959篇
  1979年   38980篇
  1978年   27450篇
  1977年   23221篇
  1976年   21455篇
  1975年   22809篇
  1974年   26788篇
  1973年   25399篇
  1972年   23801篇
  1971年   21999篇
  1970年   20226篇
  1969年   19462篇
排序方式: 共有10000条查询结果,搜索用时 171 毫秒
31.
Journal of Neuro-Oncology - Adjuvant radiation is often used in patients with low grade gliomas with high-risk characteristics with a recommended dose of 45–54 Gy. We used the...  相似文献   
32.
Biomedical Engineering - The possible use of the vortex effect in medical transfusion–infusion solution heaters was studied. A design for a device is presented, along with the trial results....  相似文献   
33.
34.
Journal of Public Health - Group prenatal care provides an alternative model of prenatal care that allows for collaboration with peers, education, discussion, and self-management training in...  相似文献   
35.
36.
Genome-scale screening experiments in cancer produce long lists of candidate genes that require extensive interpretation for biological insight and prioritization for follow-up studies. Interrogation of gene lists frequently represents a significant and time-consuming undertaking, in which experimental biologists typically combine results from a variety of bioinformatics resources in an attempt to portray and understand cancer relevance. As a means to simplify and strengthen the support for this endeavor, we have developed oncoEnrichR, a flexible bioinformatics tool that allows cancer researchers to comprehensively interrogate a given gene list along multiple facets of cancer relevance. oncoEnrichR differs from general gene set analysis frameworks through the integration of an extensive set of prior knowledge specifically relevant for cancer, including ranked gene-tumor type associations, literature-supported proto-oncogene and tumor suppressor gene annotations, target druggability data, regulatory interactions, synthetic lethality predictions, as well as prognostic associations, gene aberrations and co-expression patterns across tumor types. The software produces a structured and user-friendly analysis report as its main output, where versions of all underlying data resources are explicitly logged, the latter being a critical component for reproducible science. We demonstrate the usefulness of oncoEnrichR through interrogation of two candidate lists from proteomic and CRISPR screens. oncoEnrichR is freely available as a web-based service hosted by the Galaxy platform ( https://oncotools.elixir.no ), and can also be accessed as a stand-alone R package ( https://github.com/sigven/oncoEnrichR ).  相似文献   
37.
38.

Objective

To examine the experience of interracial anxiety among health professionals and how it may affect the quality of their interactions with patients from racially marginalized populations. We explored the influence of prior interracial exposure—specifically through childhood neighborhoods, college student bodies, and friend groups—on interracial anxiety among medical students and residents. We also examined whether levels of interracial anxiety change from medical school through residency.

Data Source

Web-based longitudinal survey data from the Medical Student Cognitive Habits and Growth Evaluation Study.

Study Design

We used a retrospective longitudinal design with four observations for each trainee. The study population consisted of non-Black US medical trainees surveyed in their 1st and 4th years of medical school and 2nd and 3rd years of residency. Mixed effects longitudinal models were used to assess predictors of interracial anxiety and assess changes in interracial anxiety scores over time.

Principal Findings

In total, 3155 non-Black medical trainees were followed for 7 years. Seventy-eight percent grew up in predominantly White neighborhoods. Living in predominantly White neighborhoods and having less racially diverse friends were associated with higher levels of interracial anxiety among medical trainees. Trainees' interracial anxiety scores did not substantially change over time; interracial anxiety was highest in the 1st year of medical school, lowest in the 4th year, and increased slightly during residency.

Conclusions

Neighborhood and friend group composition had independent effects on interracial anxiety, indicating that premedical racial socialization may affect medical trainees' preparedness to interact effectively with diverse patient populations. Additionally, the lack of substantial change in interracial anxiety throughout medical training suggests the importance of providing curricular tools and structure (e.g., instituting interracial cooperative learning activities) to foster the development of healthy interracial relationships.  相似文献   
39.
40.
Robinson  Sandra M.  Scott  Jason  Ryan  Sarah  Adams  Nicola  Hassell  Andrew  Walker  David 《Clinical rheumatology》2022,41(12):3869-3877
Clinical Rheumatology - Educating patients about methotrexate is a core role of rheumatology nurses. We have previously reported the scoring of videoed interviews of rheumatology nurses educating...  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-23

京公网安备 11010802026262号