全文获取类型
收费全文 | 3412篇 |
免费 | 379篇 |
国内免费 | 18篇 |
专业分类
耳鼻咽喉 | 115篇 |
儿科学 | 253篇 |
妇产科学 | 56篇 |
基础医学 | 328篇 |
口腔科学 | 174篇 |
临床医学 | 406篇 |
内科学 | 790篇 |
皮肤病学 | 160篇 |
神经病学 | 203篇 |
特种医学 | 213篇 |
外科学 | 342篇 |
综合类 | 193篇 |
现状与发展 | 30篇 |
预防医学 | 261篇 |
眼科学 | 23篇 |
药学 | 156篇 |
中国医学 | 3篇 |
肿瘤学 | 103篇 |
出版年
2023年 | 182篇 |
2022年 | 15篇 |
2021年 | 45篇 |
2020年 | 66篇 |
2019年 | 48篇 |
2018年 | 85篇 |
2017年 | 67篇 |
2016年 | 69篇 |
2015年 | 80篇 |
2014年 | 126篇 |
2013年 | 129篇 |
2012年 | 99篇 |
2011年 | 126篇 |
2010年 | 124篇 |
2009年 | 150篇 |
2008年 | 123篇 |
2007年 | 145篇 |
2006年 | 124篇 |
2005年 | 122篇 |
2004年 | 96篇 |
2003年 | 94篇 |
2002年 | 101篇 |
2001年 | 96篇 |
2000年 | 95篇 |
1999年 | 93篇 |
1998年 | 68篇 |
1997年 | 84篇 |
1996年 | 60篇 |
1995年 | 59篇 |
1994年 | 44篇 |
1993年 | 59篇 |
1992年 | 64篇 |
1991年 | 78篇 |
1990年 | 66篇 |
1989年 | 94篇 |
1988年 | 73篇 |
1987年 | 77篇 |
1986年 | 58篇 |
1985年 | 63篇 |
1984年 | 40篇 |
1983年 | 24篇 |
1982年 | 24篇 |
1981年 | 31篇 |
1980年 | 28篇 |
1979年 | 29篇 |
1978年 | 23篇 |
1977年 | 21篇 |
1976年 | 22篇 |
1975年 | 18篇 |
1974年 | 18篇 |
排序方式: 共有3809条查询结果,搜索用时 15 毫秒
81.
ECG‐gated pulmonary artery CTA for evaluation of right ventricular function in patients with acute pulmonary embolism 下载免费PDF全文
82.
83.
84.
Head injuries are a major concern for physicians in athletes of all ages. Specifically, sports-related concussions are becoming an all-too-common injury among female athletes. The incidence of concussions among female athletes has likely increased over the past few decades because of an increase in sports participation afforded by Title IX. It would be useful for physicians to have general knowledge of concussions and their potential sex-related differences. This review article summarizes the current body of research concerning sex-related differences in concussion epidemiology and outcomes. A literature search was performed using PubMed and included all articles published from 1993 to present, with a predominant focus on research conducted over the past fifteen years. Additional articles were found using the bibliography from articles found through the PubMed search. Several articles have compared incidence, severity of neurological deficit, constellation of symptoms, and length of recovery post-concussion in males and females. However, the literature does not unanimously support a significant sex-related difference in concussions. Lack of consensus in the literature can be attributed to differences between patient populations, different tools used to study concussions, including subjective or objective measures, and differences in mechanisms of injury. We conclude that concussions are a serious injury in both male and female athletes, and physicians should have a very high index of suspicion regardless of sex, because there currently is not sufficient consensus in the literature to institute sex-related changes to concussion management. Current research may suggest a sex-related difference pertaining to sports-related concussions, but further evaluation is needed on this topic. 相似文献
85.
86.
The evaluation of gastrointestinal function in diabetic patients 总被引:2,自引:0,他引:2
Quigley EM 《World journal of gastroenterology : WJG》1999,5(4):13-282
Nowadays,anumberofoptionsareavailablefortheasesmentofgastricmotorfunction.Thus,aglobalevaluationofgastricmotorfunctionmaybeob... 相似文献
87.
88.
Dr. Lawrence S. Linn PhD Robert H. Brook MD ScD Virginia A. Clark PhD Allyson Ross Davies PhD Arlene Fink PhD Jacqueline Kosecoff PhD Pam Salisbury 《Journal of general internal medicine》1986,1(2):104-108
This paper presents data on the characteristics, work activities, job-related stress, work satisfaction, and career aspirations
of 150 faculty and 595 housestaff physicians who regularly provide continuous primary care in 15 teaching hospital-based group
practices. The faculty were young, board-certified generalists; they had been recruited from local training programs and spent
the majority of their time seeing patients and supervising housestaff. Job satisfaction among faculty and housestaff was generally
high. Dissatisfaction occurred most often with aspects of work over which physicians had little control. Although work-related
stress was common, it was not related to job satisfaction. Compared with housestaff in traditional residency programs, housestaff
enrolled in special Primary Care Training Programs reported significantly greater job satisfaction. For all housestaff, satisfaction
with work in the group practice was consistently associated with decreased interest in subspecialty training.
assisted in preparing this report.
Received from the Department of Medicine and the School of Public Health, UCLA Center for the Health Sciences. Los Angeles.
California.
Supported by Grant #59082 from the Robert Wood Johnson Foundation.
The views expressed herein do not necessarily represent those of the Robert Wood Johnson Foundation. 相似文献
89.
Rajagopalan S Brook R Mehta RH Supiano M Pitt B 《The American journal of cardiology》2002,89(5):562-566
Aging is associated with progressive deterioration in endothelial function. We hypothesized that losartan may represent a useful therapeutic strategy to ameliorate endothelial function in aged subjects. Eighteen healthy older subjects (mean age 75 +/- 3 years) were prospectively randomized in a double-blind, crossover fashion to receive either losartan 50 mg/day or placebo for 6 weeks. Subjects were switched to the opposite arm after a 2- week washout period. Flow-mediated dilation (FMD) in the brachial artery and plasma levels of vascular cell adhesion molecule-1, intercellular adhesion molecule (ICAM), moncocyte chemoattractant 1 protein, and E-selectin were measured in both arms at the beginning and end of the 6-week period. Losartan resulted in a 6-mm Hg decrease in systolic blood pressure (from 130 +/- 12 to 124 +/- 13 mm Hg), which was no different from placebo (132 +/- 12 to 127 +/- 13 mm Hg). FMD increased from 3.1 +/- 0.6% to 3.9 +/- 0.6% after losartan, and decreased from 3.3 +/- 0.3% to 2.4 +/- 0.6% after placebo (p = NS for both). In contrast, losartan reduced circulating concentrations of vascular cell adhesion molecule 1 (750 +/- 73 to 572 +/- 39), ICAM (405 +/- 26 to 196 +/- 10), and moncocyte chemoattractant 1 protein (560 +/- 56 to 423 +/- 35) (p <0.01 for all by analysis of variance), but not E-selectin. On univariate analyses, the strongest predictor of baseline endothelial function and change in FMD with losartan was low-density lipoprotein. There was a negative correlation between baseline endothelial function and change in FMD in response to losartan (r(2) = -0.75, p = 0.0003). Baseline ICAM levels alone significantly correlated with low-density lipoprotein cholesterol (r(2) = 0.54, p = 0.02) and weakly correlated with total cholesterol (r(2) = 0.47, p = 0.05). Thus, administration of losartan for a duration of 6 weeks has favorable effects on inflammatory markers in healthy older subjects, but does not alter peripheral conduit endothelial function. 相似文献
90.