全文获取类型
收费全文 | 2368篇 |
免费 | 188篇 |
国内免费 | 5篇 |
专业分类
耳鼻咽喉 | 19篇 |
儿科学 | 81篇 |
妇产科学 | 55篇 |
基础医学 | 236篇 |
口腔科学 | 44篇 |
临床医学 | 343篇 |
内科学 | 447篇 |
皮肤病学 | 37篇 |
神经病学 | 214篇 |
特种医学 | 78篇 |
外国民族医学 | 1篇 |
外科学 | 212篇 |
综合类 | 51篇 |
预防医学 | 327篇 |
眼科学 | 69篇 |
药学 | 169篇 |
中国医学 | 20篇 |
肿瘤学 | 158篇 |
出版年
2023年 | 33篇 |
2022年 | 32篇 |
2021年 | 68篇 |
2020年 | 46篇 |
2019年 | 64篇 |
2018年 | 50篇 |
2017年 | 41篇 |
2016年 | 46篇 |
2015年 | 54篇 |
2014年 | 89篇 |
2013年 | 131篇 |
2012年 | 150篇 |
2011年 | 141篇 |
2010年 | 88篇 |
2009年 | 77篇 |
2008年 | 113篇 |
2007年 | 118篇 |
2006年 | 103篇 |
2005年 | 120篇 |
2004年 | 98篇 |
2003年 | 102篇 |
2002年 | 73篇 |
2001年 | 28篇 |
2000年 | 37篇 |
1999年 | 34篇 |
1998年 | 21篇 |
1997年 | 15篇 |
1996年 | 16篇 |
1995年 | 14篇 |
1993年 | 16篇 |
1992年 | 27篇 |
1991年 | 22篇 |
1990年 | 31篇 |
1989年 | 33篇 |
1988年 | 32篇 |
1987年 | 23篇 |
1986年 | 27篇 |
1985年 | 40篇 |
1984年 | 28篇 |
1983年 | 17篇 |
1982年 | 15篇 |
1981年 | 13篇 |
1980年 | 15篇 |
1979年 | 23篇 |
1978年 | 20篇 |
1976年 | 15篇 |
1973年 | 17篇 |
1972年 | 15篇 |
1969年 | 20篇 |
1966年 | 14篇 |
排序方式: 共有2561条查询结果,搜索用时 15 毫秒
41.
42.
44.
D. Linn Holness 《Current allergy and asthma reports》2014,14(2):1-5
Occupational contact dermatitis, including occupational allergic contact dermatitis, is one of the most common occupational diseases. Making a timely and accurate diagnosis is important to improving the outcome. Taking a work history and patch testing are essential elements in the diagnostic process. Management, based on an accurate diagnosis, must include both medical treatment to address the disease and workplace modifications as appropriate to reduce exposure the causative agents. 相似文献
45.
Background
Anastomotic bleeding following stapled left-sided colorectal resections is uncommon. There have been few reports on the incidence, severity, management and outcome of such stapled line haemorrhage in the literature. Here, we report our experience of anastomotic bleeding from a stapled anastomosis in laparoscopic left-sided colorectal surgery. 相似文献46.
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
47.
Singh SN Singh BN Reda DJ Fye CL Ezekowitz MD Fletcher RD Sharma SC Atwood JE Jacobson AK Lewis HD Antman EM Falk RH Lopez B Tang XC 《The American journal of cardiology》2003,92(4):468-472
The Sotalol-Amiodarone Fibrillation Efficacy Trial (SAFE-T) is a randomized, double-blind, multicenter, placebo-controlled trial in which the effects of sotalol and amiodarone in maintaining stability of sinus rhythm are being examined in patients with persistent atrial fibrillation at 20 Veterans Affairs medical centers. The time to the occurrence of atrial fibrillation or flutter in patients with atrial fibrillation converted to sinus rhythm is the primary outcome measure, with a number of parameters as secondary end points. SAFE-T had randomized 665 patients when enrollment terminated on October 31, 2001. Follow-up of patients continued until October 31, 2002, for a maximum period of 54 months and a minimum period of 12 months for all patients. 相似文献
48.
49.
Health effects of ozone exposure in asthmatics 总被引:1,自引:0,他引:1
W S Linn R D Buckley C E Spier R L Blessey M P Jones D A Fischer J D Hackney 《The American review of respiratory disease》1978,117(5):835-843
To investigate whether ambient air quality standards for ozone adequately protect high-risk populations, we assessed pulmonary and biochemical responses of 22 asthmatic volunteers to 2-hour controlled exposures to ozone at concentrations approximating 0.2 ppm, with secondary stresses of heat and intermittent exercise. All subjects had physician-diagnosed asthma; clinically, they covered a range from minimal wheezing to persistent marked abnormality in forced expiratory performance. Control experiments included repeated sham exposures (to purified air with no ozone added) as well as brief exposures to the odor of ozone followed by purified air. No meaningful changes in forced expiratory measures, lung volumes, or single-breath N2 indices were found after ozone exposure relative to control. Symptoms, scored semiquantitatively, increased slightly but not significantly with exposure to ozone. Small but significant (P is less than 0.05) group mean blood biochemical changes occurred with exposure to ozone; these included increased glucose-6-phosphate dehydrogenase and lactate dehydrogenase activities, increased erythrocyte fragility, and decreased concentration of reduced glutathione. Hemoglobin concentration and acetylcholinesterase activity decreased with ozone and decreased to a lesser extent in control studies. Concentrations of ozone readily attainable in smog episodes thus appear to be capable of affecting blood biochemistry in at least some asthmatic persons, in the absence of obvious adverse pulmonary responses. Whether the biochemical effects represent harm to health or a normal response to stress remains to be determined. 相似文献
50.
Oleic acid emulsions stabilized with albumin were infused into fasted rats. Blood samples taken before and during infusion were analyzed for free fatty acids (FFA), ketone bodies, glucose, and insulin. Turnover rates of FFA and ketone bodies were also determined using constant infusion of radioactive tracers. During oleic acid infusions at a rate of 2 mumoles/min/100 g body weight, FFA concentrations increased for a short time and then decreased to preinfusion levels. The decreases in concentrations were due to decreases in the endogenous rates of appearance of FFA into the blood. When oleic acid was infused at a rate of 3.5 mumoles/min/100 g body weight, FFA concentrations increased and remained elevated throughout the infusion. Ketone body concentrations more than doubled during infusions at 2 and 3.5 mumoles/min/100 g body weight and showed no signs of decreasing even when FFA concentrations decreased. Insulin concentrations doubled during infusion and glucose concentrations decreased. Insulin injected during infusion had little effect on concentrations of FFA or ketone bodies. It was concluded that infusions of oleic acid inhibit adipose tissue lipolysis and increase blood ketone concentrations in intact fasted rats. The injection of insulin does not inhibit ketogenesis when blood FFA levels are maintained by infusion. 相似文献