全文获取类型
收费全文 | 1421篇 |
免费 | 147篇 |
国内免费 | 6篇 |
专业分类
耳鼻咽喉 | 7篇 |
儿科学 | 88篇 |
妇产科学 | 23篇 |
基础医学 | 202篇 |
口腔科学 | 39篇 |
临床医学 | 212篇 |
内科学 | 212篇 |
皮肤病学 | 5篇 |
神经病学 | 164篇 |
特种医学 | 103篇 |
外科学 | 143篇 |
综合类 | 48篇 |
预防医学 | 137篇 |
眼科学 | 27篇 |
药学 | 86篇 |
中国医学 | 4篇 |
肿瘤学 | 74篇 |
出版年
2021年 | 15篇 |
2020年 | 20篇 |
2019年 | 17篇 |
2018年 | 23篇 |
2017年 | 14篇 |
2016年 | 18篇 |
2015年 | 24篇 |
2014年 | 21篇 |
2013年 | 43篇 |
2012年 | 69篇 |
2011年 | 53篇 |
2010年 | 42篇 |
2009年 | 38篇 |
2008年 | 56篇 |
2007年 | 48篇 |
2006年 | 59篇 |
2005年 | 59篇 |
2004年 | 53篇 |
2003年 | 71篇 |
2002年 | 52篇 |
2001年 | 53篇 |
2000年 | 41篇 |
1999年 | 38篇 |
1998年 | 28篇 |
1997年 | 25篇 |
1996年 | 23篇 |
1995年 | 24篇 |
1994年 | 20篇 |
1993年 | 18篇 |
1992年 | 26篇 |
1991年 | 34篇 |
1990年 | 33篇 |
1989年 | 42篇 |
1988年 | 42篇 |
1987年 | 30篇 |
1986年 | 33篇 |
1985年 | 29篇 |
1984年 | 25篇 |
1983年 | 12篇 |
1982年 | 10篇 |
1981年 | 13篇 |
1979年 | 13篇 |
1978年 | 17篇 |
1977年 | 11篇 |
1976年 | 21篇 |
1975年 | 10篇 |
1974年 | 13篇 |
1972年 | 14篇 |
1971年 | 13篇 |
1970年 | 13篇 |
排序方式: 共有1574条查询结果,搜索用时 0 毫秒
1.
2.
A review of the complications of urethral instrumentation performed at our institution during the last 15 years revealed 2 cases of urethrorectal perforation. These patients were managed with loop colostomy and suprapubic cystostomy diversion with excellent healing and no evidence of fistula formation at 24-month followup. This rare complication is described and the principles of diagnosis, prevention and prompt aggressive management are emphasized. 相似文献
3.
E Grunfeld R Glossop I McDowell C Danbrook 《Canadian Medical Association journal》1997,157(8):1101-1105
The emphasis on home-based care is one important aspect of health services restructuring initiatives in Canada. Fundamental to the preference for home-based care over institutional care is the expectation that family caregivers will be available in the home to support patients who would otherwise be in an institution. The authors explore the potential impact of this devolution of services from institutions to the home in 2 vulnerable patient populations--elderly patients with dementia and elderly patients with terminal illnesses. Community-based surveillance strategies are needed to determine the true health, quality-of-life and economic outcomes of these restructuring initiatives. 相似文献
4.
5.
6.
I McDowell 《American journal of preventive medicine》1988,4(3):172-177
Most approaches to preventing chronic disease involve changing personal behavior. Appeals to change are often made on the grounds that certain behavior incurs a risk to health, but evaluative studies of health education suggest that this may not be a persuasive argument. Humans have always lived with risks and do not necessarily equate risk with personal danger. Many forces, both social and psychological, underlie the willingness to tolerate risks, and altering familiar behaviors may seem to the individual to be more of a loss than a benefit. If we seek to change health behavior, we must acknowledge this and recognize that factual information on risks will not encourage change unless the change forms part of a broader reappraisal of the person's values. Individual appeals for change will have little impact as long as broader social forces continue to encourage health risk behavior. 相似文献
7.
8.
B. M. McClements I. F. W. McDowell D. R. McCluskey 《Irish journal of medical science》1988,157(5):157-157
We report a case of malignant melanoma in which the presenting feature was melanuria. Melanuria should be considered in the differential diagnosis of any patient presenting with dark urine. 相似文献
9.
R Dixon AM Hughes K Nairn M Sellers JV Kemp RA Yates 《Cephalalgia : an international journal of headache》1998,18(7):468-475
Zolmitriptan (ZomigTM ) is a 5HT1B/1D agonist which has the ability to cross the intact blood-brain barrier to access central as well as peripheral receptors. Because of the potential for central nervous system side effects, this randomized, double-blind, placebo-controlled, 6-period crossover study evaluated the effects of 2.5 and 5 mg doses of zolmitriptan on psychomotor performance and investigated any pharmacodynamic or pharmacokinetic interaction with diazepam. Twelve healthy volunteers received the following "treatments" as single doses: zolmitriptan 2.5 mg, zolmitriptan 5 mg, diazepam 10 mg, zolmitriptan 2.5 mg+diazepam 10 mg, zolmitriptan 5 mg+diazepam 10 mg and placebo. Pre-dose and at 1, 4, 8, and 24 h post-dose, the following validated battery of psychomotor tests was performed: Bond-Lader visual analogue scales (calmness, contentedness, and alertness factors), critical flicker fusion test, choice reaction time (recognition, motor, and total reaction times), finger-tapping test, number cancellation test and digit symbol substitution test. Plasma concentrations of zolmitriptan, its active metabolite, and diazepam and its active metabolites were measured at the same timepoints. Zolmitriptan 2.5 and 5 mg had no effect on psychomotor function when given alone. In contrast, diazepam 10 mg had profound effects, consistent with its sedative properties, but there was no synergism on concomitant administration of either dose of zolmitriptan. Plasma concentrations of zolmitriptan, diazepam, and their respective active metabolites were similar when the two drugs were given alone or in combination. 相似文献
10.
Ask the Expert provides research‐based answers to practice questions submitted by JSPN readers. 相似文献