全文获取类型
收费全文 | 61436篇 |
免费 | 5787篇 |
国内免费 | 530篇 |
专业分类
耳鼻咽喉 | 789篇 |
儿科学 | 1919篇 |
妇产科学 | 1151篇 |
基础医学 | 7470篇 |
口腔科学 | 772篇 |
临床医学 | 6704篇 |
内科学 | 14258篇 |
皮肤病学 | 810篇 |
神经病学 | 5682篇 |
特种医学 | 1972篇 |
外科学 | 9676篇 |
综合类 | 1969篇 |
现状与发展 | 2篇 |
一般理论 | 45篇 |
预防医学 | 5040篇 |
眼科学 | 1276篇 |
药学 | 3895篇 |
2篇 | |
中国医学 | 246篇 |
肿瘤学 | 4075篇 |
出版年
2024年 | 75篇 |
2023年 | 690篇 |
2022年 | 744篇 |
2021年 | 1594篇 |
2020年 | 1068篇 |
2019年 | 1268篇 |
2018年 | 2042篇 |
2017年 | 1619篇 |
2016年 | 1824篇 |
2015年 | 2007篇 |
2014年 | 2330篇 |
2013年 | 3123篇 |
2012年 | 4563篇 |
2011年 | 4599篇 |
2010年 | 2850篇 |
2009年 | 2651篇 |
2008年 | 3799篇 |
2007年 | 3873篇 |
2006年 | 3614篇 |
2005年 | 3785篇 |
2004年 | 3884篇 |
2003年 | 3562篇 |
2002年 | 3097篇 |
2001年 | 1062篇 |
2000年 | 567篇 |
1999年 | 708篇 |
1998年 | 842篇 |
1997年 | 715篇 |
1996年 | 482篇 |
1995年 | 432篇 |
1994年 | 372篇 |
1993年 | 368篇 |
1992年 | 321篇 |
1991年 | 251篇 |
1990年 | 239篇 |
1989年 | 230篇 |
1988年 | 217篇 |
1987年 | 182篇 |
1986年 | 167篇 |
1985年 | 144篇 |
1984年 | 155篇 |
1983年 | 132篇 |
1982年 | 165篇 |
1981年 | 174篇 |
1980年 | 120篇 |
1979年 | 83篇 |
1978年 | 81篇 |
1977年 | 84篇 |
1976年 | 65篇 |
1975年 | 67篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
R. N. Sinha A. W. Patrick L. Richardson M. Wallymahmed I. A. MacFarlane 《Postgraduate medical journal》1997,73(859):293-294
One hundred insulin-dependent diabetic patients (age < 45 years, 53 smokers) were followed for six years. The age, duration of diabetes and mean glycated haemoglobin levels, were comparable between the smokers and non-smokers. Microvascular complications (retinopathy and increased urine albumin excretion) were commoner and more severe in the smoking group at six years, particularly in heavy smokers. Of the 45 original smokers reviewed at six years, 12 (27%) had stopped, six of whom had developed microvascular complications. Only two of the ''heavy'' initial smokers, likely to be at most risk, had stopped smoking, and three original non-smokers had started smoking. 相似文献
62.
63.
Patrick M. Rao M.D. A. John Kuta M.D. Michele H. Johnson M.D. 《Emergency radiology》1995,2(5):303-304
We present a case in which an open fracture of the ulna penetrated the skull and caused a comminuted, depressed skull fracture
with a large intraparenchymal hematoma containing bone fragments. 相似文献
64.
医院综合效益评价案例分析 总被引:2,自引:0,他引:2
西南地区医院综合效益评价课题组 《中国医院管理》1994,14(2):32-35
运用层次分析法建立了医院综合效益评价指标体系,开发了医院综合效益九型评价图,用于显著评价结果。在此基础上进行了3个案例的评价分析。论述了通过对西南地区27所医院综合效益4年多的追踪分析所发现的共性问题,并提出了相应的管理对策。 相似文献
65.
复治矽肺结核化疗效果观察 总被引:3,自引:0,他引:3
我们自1980~1988年对79例复治矽肺结核进行化疗。其中绝大多数为慢性纤维化空洞性病例,均经细菌学证实,并由尘肺诊断组认定为矽肺合并结核。本组病例分别以KM、INH、RFP、PZA,或SM、INH、RFP、EB联合,分两阶段治疗18个月,获痰菌阴转79.2%,其中KHRZ与SHRE组分别为93.9%与68.2%(P<0.05)。自疗程结束追踪2~8年,其细菌复阳率分别为6.45%和10.0%(P>0.1)。并对影响其过去治疗失败的原因及对策进行了讨论。 相似文献
66.
This study investigated the effects of structured group workshops for a population with special needs. Twenty subjects, each with a mild or moderate mental handicap, attended a series of 10 weekly 1-hour music workshops on the structured group playing of a Javanese Gamelan. Twenty subjects formed a non-intervention control group. The experimental hypothesis was that participation in the experimental group would produce significant improvements in musical ability as measured by the Rossi test of musical ability, devised and validated for use in this study. Significant gains in communication skills as measured by the Communication Assessment Profile for Adults with a Mental Handicap (CASP) and self-esteem levels measured by the Khalid semantic differential technique were also postulated. It was also suggested that these gains would be significantly correlated. Results show significant gains in musical ability (instrumental rhythm production: t = 5.67, d.f. = 29, p < 0.01 and simple rhythm production: t = 8.42, d.f. = 29, p < 0.01) and communication skills (t = 4.69, d.f. = 29, p < 0.01). Moreover these results are significantly correlated (r = 0.59, p < 0.05, r = 0.75, p < 0.05, r = 0.56, p < 0.05). A ceiling effect was obtained in the measurement of self-esteem. It is suggested that these gains derive from certain aspects of the musical communicative environment at the workshops. Suggestions for future research involve examining the possible influences on these developments. 相似文献
67.
Patrick Royston 《Statistics in medicine》1993,12(2):181-184
An easy-to-calculate approximation to the Shapiro—Francia W' test and its P-value is proposed. Its accuracy is sufficient for practical application in samples of size 5 or larger. 相似文献
68.
69.
The discriminative stimulus properties of (+)-lysergic acid diethylamide (LSD) and lisuride hydrogen maleate (LHM), were compared in a three-choice, water reinforced (FR 20) situation in which rats were required to press one lever following LSD (0.08 mg/kg), a second lever following LHM (0.04 mg/kg), and a third lever following saline. Reliable drug-appropriate responding was established in 72 sessions. Dose-response tests with LSD and LHM indicated that, as dose increased, the per cent of responding on the lever associated with the particular training drug also increased; little or no cross-transfer occurred between LSD and LHM. In generalization tests, the serotonin (5-HT) agonist quipazine substituted for LSD but not LHM while the dopamine (DA) agonist apomorphine mimicked LHM but not LSD; an unrelated compound, pentylenetetrazol (PTZ), produced responding on the saline-appropriate lever. In combination tests, 5-HT antagonists (e.g., BC-105 and low doses of pirenperone) blocked responding on the LSD lever while DA antagonists (e.g., haloperidol and much higher doses of pirenperone) blocked LHM-appropriate responding. These data suggest that the three-lever (D-D-N) procedure is similar to, but can be more sensitive than the two-lever (D-N) procedure (because it can differentiate between LSD and LHM); they therefore at least partially support the hypothesis that three-choice discriminations can be conceptualized as two separate, two-choice (D-N) discriminations (Jarbe and Swedberg 1982). The results also confirm suggestion that the stimulus effects of LSD and LHM are mediated by different mechanisms; the primary action of LSD is serotonergic (5-HT2), while that of LHM is dopaminergic (White 1986).Some of these data were presented at the meeting of the Society of Neuroscience, Toronto, 1988 (Satellite Session of the Society for the Stimulus Properties of Drugs). They were also submitted (in somewhat different form) to the Graduate School of the University of South Carolina in partial fulfillment of the requirements for an MA degree (in Experimental Psychology) 相似文献
70.
CHEP Recommendations: Applying the 2005 Canadian Hypertension Education Program recommendations: 2. Assessing and reducing global atherosclerotic risk among hypertensive patients 下载免费PDF全文