全文获取类型
收费全文 | 102660篇 |
免费 | 29808篇 |
国内免费 | 1068篇 |
专业分类
耳鼻咽喉 | 2453篇 |
儿科学 | 2928篇 |
妇产科学 | 2413篇 |
基础医学 | 3171篇 |
口腔科学 | 5057篇 |
临床医学 | 26468篇 |
内科学 | 25526篇 |
皮肤病学 | 3399篇 |
神经病学 | 12689篇 |
特种医学 | 3838篇 |
外科学 | 18708篇 |
综合类 | 311篇 |
现状与发展 | 40篇 |
一般理论 | 3篇 |
预防医学 | 13778篇 |
眼科学 | 2267篇 |
药学 | 1353篇 |
2篇 | |
中国医学 | 11篇 |
肿瘤学 | 9121篇 |
出版年
2024年 | 742篇 |
2023年 | 5036篇 |
2022年 | 1099篇 |
2021年 | 2740篇 |
2020年 | 5339篇 |
2019年 | 2054篇 |
2018年 | 6917篇 |
2017年 | 7361篇 |
2016年 | 7923篇 |
2015年 | 8028篇 |
2014年 | 10456篇 |
2013年 | 12173篇 |
2012年 | 3825篇 |
2011年 | 3597篇 |
2010年 | 6861篇 |
2009年 | 9130篇 |
2008年 | 3625篇 |
2007年 | 2522篇 |
2006年 | 3726篇 |
2005年 | 2303篇 |
2004年 | 1652篇 |
2003年 | 1333篇 |
2002年 | 1235篇 |
2001年 | 2101篇 |
2000年 | 1433篇 |
1999年 | 1895篇 |
1998年 | 2131篇 |
1997年 | 1961篇 |
1996年 | 2042篇 |
1995年 | 1770篇 |
1994年 | 1136篇 |
1993年 | 994篇 |
1992年 | 945篇 |
1991年 | 837篇 |
1990年 | 679篇 |
1989年 | 669篇 |
1988年 | 667篇 |
1987年 | 541篇 |
1986年 | 489篇 |
1985年 | 439篇 |
1984年 | 352篇 |
1983年 | 400篇 |
1982年 | 289篇 |
1981年 | 241篇 |
1980年 | 153篇 |
1979年 | 137篇 |
1978年 | 175篇 |
1977年 | 171篇 |
1976年 | 138篇 |
1975年 | 128篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
George E. Fryer PhD Curtis Stine MD Richard D. Krugman MD Thomas J. Miyoshi 《The Journal of rural health》1994,10(3):193-198
The performance of area health education center (AHEC)-stimulated programs and decentralized education for medicine is not well understood. The Statewide Education Activities for Rural Colorado's Health (SEARCH)/AHEC project at the University of Colorado School of Medicine was examined to determine if the program had an effect on the practice location of its graduates. Practice location and specialty of graduates of the University of Colorado School of Medicine (UCSOM) classes 1980-1985 were compared for students who had participated in decentralized SEARCH/AHEC experiences versus students who had not. The majority of the graduates were practicing out of state in 1990. Non-Colorado doctors were more often practicing in rural (non-metropolitan statistical area [MSA]) counties and in towns of fewer than 2,500, 5,000 and 10,000 residents, respectively. In addition, of the 251 active patient care physicians practicing in Colorado communities of fewer than 10,000 in non-MSA counties in 1986, those who precepted UCSOM students on SEARCH rotations were more likely to have remained in their same practice location in 1992 (77.8% versus 62.1% for those who had not precepted students). This analysis of both student and preceptor practice patterns documents the value of decentralized medical education in addressing the geographic and specialty maldistribution of physicians. These results have important policy implications for funding medical education programs. 相似文献
82.
We argue that, for solutions of immobilized protein and for tissue, the dependence of 1/T1 of solvent protons on B(0) at low fields and 1/T1 rho on B1 for all B(0) are both manifestations of the same underlying phenomena: magnetization transfer between mobile water protons and solid-state broadened protein proton levels. Broadening causes rapid mixing of spin orientation within the transverse plane, at all B(0), unless B1 is greater than the protein internal field; this affects 1/T1 rho of solvent protons by magnetization transfer. Similarly, decreasing B(0) below the internal field mixes all orientations of magnetization, which affects the solvent proton low-field 1/T1 and high-field 1/T2. 相似文献
83.
Gerald F. Powell MD Barbara A. Bettes PhD 《Child psychiatry and human development》1992,22(3):185-198
A controversy exists regarding the classification of nonorganic failure to thrive within the psychiatric nomenclature. There are a number of DSM-III-R diagnoses that may be applied to NOFTT, including Reactive Attachment Disorder of Infancy (RADI) and Major Depressive Disorder (MDD). The behaviors characteristic of NOFTT are symptomatic of depression, and are similar to those exhibited by infants with anaclitic depression as well as those of the adult with depression. The correspondence of the behaviours of NOFTT and the DSM-III-R criteria for Major Depression are reviewed, as are the conceptual and therapeutic reasons to view NOFTT infants as suffering from Depression. 相似文献
84.
85.
86.
87.
88.
Andrew R. Hoellein MD Christopher A. Feddock MD Charles H. Griffith III MD MSPH John F. Wilson PhD Donald R. Barnett MD MSPH Pat F. Bass III MD MS T. Shawn Caudill MD MSPH 《Journal of general internal medicine》2004,19(5P2):562-565
Due to recent public debate and newly imposed resident work hour restrictions, we decided to investigate the relationship of resident call status to their ambulatory patients' satisfaction. Resident continuity clinic patients were asked to rate their level of satisfaction on a 10-point Likert-type scale. Using multiple regression approaches, these data were then assessed as a function of resident call status. We found that in 646 patient encounters, patient satisfaction scores were significantly less when the resident was postcall, 8.99 ± 1.8, than when not postcall, 9.31 ± 1.3. We herein discuss etiologies and implications of these findings for both patient care and medical education. 相似文献
89.
90.