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   30671篇
  免费   2049篇
  国内免费   52篇
耳鼻咽喉   221篇
儿科学   847篇
妇产科学   1014篇
基础医学   3720篇
口腔科学   411篇
临床医学   4478篇
内科学   5763篇
皮肤病学   398篇
神经病学   3199篇
特种医学   636篇
外科学   3198篇
综合类   384篇
一般理论   34篇
预防医学   3987篇
眼科学   677篇
药学   1833篇
中国医学   25篇
肿瘤学   1947篇
  2023年   173篇
  2022年   117篇
  2021年   512篇
  2020年   356篇
  2019年   594篇
  2018年   708篇
  2017年   493篇
  2016年   567篇
  2015年   660篇
  2014年   965篇
  2013年   1427篇
  2012年   2065篇
  2011年   2251篇
  2010年   1198篇
  2009年   1043篇
  2008年   1870篇
  2007年   2110篇
  2006年   1931篇
  2005年   1912篇
  2004年   1899篇
  2003年   1737篇
  2002年   1710篇
  2001年   507篇
  2000年   449篇
  1999年   399篇
  1998年   313篇
  1997年   233篇
  1996年   183篇
  1995年   231篇
  1994年   215篇
  1993年   167篇
  1992年   256篇
  1991年   230篇
  1990年   260篇
  1989年   216篇
  1988年   232篇
  1987年   210篇
  1986年   214篇
  1985年   213篇
  1984年   153篇
  1983年   149篇
  1982年   124篇
  1981年   110篇
  1980年   103篇
  1979年   157篇
  1978年   106篇
  1977年   88篇
  1976年   82篇
  1974年   73篇
  1972年   81篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Cardiovascular Drugs and Therapy - Available animal models of acute heart failure (AHF) and their limitations are discussed herein. A novel and preclinically relevant porcine model of decompensated...  相似文献   
2.
3.
There is an increase in older-adult renal transplant recipients in United States. The objective of this study was to assess the association between physical function (PF) and patient survival in renal transplant recipients who are aged 65 years or older. Using United Network for Organ Sharing (UNOS) data from 2007 to 2016, renal transplant recipients aged 65 years or older were included. Multivariable Cox regression was used to assess associations between survival and functional status adjusted for age, sex, race, donor quality, diabetes, and dialysis vintage. The study identified 26,721 patients. Patient survival was significantly higher in recipients who needed no assistance and lowest in patients in need of total assistance (P < .0001). In deceased donor (DD) transplants, the relative risk for mortality was 2.06 (1.74-2.43) for total assistance and 1.17 (1.08-1.28) for moderate assistance compared to no assistance (P < .0001). In living donor (LD) transplants, the relative risk of mortality was 1.38 (0.78-2.42) for patients needing total assistance and 1.37 (1.14-1.65) for patients needing moderate assistance compared to patients who did not need assistance (0.003). PF is an independent predictor of post-transplant mortality. Assessment of older potential renal transplant recipients should include assessment and standardization of functional status to counsel about post-transplant survival.  相似文献   
4.
5.
6.
Digestive Diseases and Sciences -  相似文献   
7.
8.
9.
ObjectivesThe aim of this study was to retrospectively examine trends in percutaneous exposure incidences (PEIs) at the School of Dentistry (SoD) from 2009 to 2019 and to report on the underreporting rate of PEIs, current attitudes, and awareness of PEI safety protocols from clinical staff and students at the SoD in 2019.MethodsRetrospective data were collected from deidentified archival incident reports from 2009 to 2019 from the SoD's incident reporting system (UQSafe and Legacy Database). Additionally, cross-sectional data were collected via the validated Percutaneous Exposure Incident Questionnaires (PEIQ) completed by clinical staff and students of the SoD in 2019.ResultsFrom the archival data, the majority (79.9%) of the 618 reported PEIs involved students. Local anaesthetic-related procedures were the most common cause in the archival (31.5%) and survey data (23.7%), whereas the needle-prick was the most common causative instrument in both data sets. Additionally, the finger was the most common site of injury found in the archival (53.0%) and survey data (52.8%). From 345 responses to the survey, 42.1% of PEIs sustained were not reported.ConclusionsStudents were at a higher risk of sustaining a PEI than staff members between 2009 and 2019. The reported knowledge on PEI classification and preventative measures is inadequate, suggesting that further PEI education is necessary. The study provides evidence of the trends in PEIs as well as data on the attitudes and awareness of student and staff at a dental teaching faculty to support the development of PEI safety management protocols.  相似文献   
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