全文获取类型
收费全文 | 4473篇 |
免费 | 310篇 |
国内免费 | 49篇 |
专业分类
耳鼻咽喉 | 95篇 |
儿科学 | 144篇 |
妇产科学 | 66篇 |
基础医学 | 466篇 |
口腔科学 | 52篇 |
临床医学 | 558篇 |
内科学 | 801篇 |
皮肤病学 | 108篇 |
神经病学 | 371篇 |
特种医学 | 390篇 |
外科学 | 556篇 |
综合类 | 315篇 |
一般理论 | 1篇 |
预防医学 | 419篇 |
眼科学 | 57篇 |
药学 | 224篇 |
2篇 | |
中国医学 | 33篇 |
肿瘤学 | 174篇 |
出版年
2022年 | 56篇 |
2021年 | 92篇 |
2020年 | 62篇 |
2019年 | 51篇 |
2018年 | 77篇 |
2017年 | 59篇 |
2016年 | 61篇 |
2015年 | 75篇 |
2014年 | 118篇 |
2013年 | 183篇 |
2012年 | 192篇 |
2011年 | 206篇 |
2010年 | 183篇 |
2009年 | 177篇 |
2008年 | 192篇 |
2007年 | 180篇 |
2006年 | 190篇 |
2005年 | 154篇 |
2004年 | 146篇 |
2003年 | 151篇 |
2002年 | 141篇 |
2001年 | 120篇 |
2000年 | 92篇 |
1999年 | 87篇 |
1998年 | 106篇 |
1997年 | 102篇 |
1996年 | 90篇 |
1995年 | 86篇 |
1994年 | 59篇 |
1993年 | 64篇 |
1992年 | 62篇 |
1991年 | 53篇 |
1990年 | 67篇 |
1989年 | 65篇 |
1988年 | 72篇 |
1987年 | 81篇 |
1986年 | 67篇 |
1985年 | 80篇 |
1984年 | 49篇 |
1983年 | 40篇 |
1982年 | 35篇 |
1980年 | 26篇 |
1979年 | 27篇 |
1978年 | 25篇 |
1977年 | 23篇 |
1976年 | 23篇 |
1958年 | 29篇 |
1956年 | 31篇 |
1955年 | 43篇 |
1954年 | 36篇 |
排序方式: 共有4832条查询结果,搜索用时 812 毫秒
1.
3.
4.
P E Santos E Piontelli Y R Shea M L Galluzzo S M Holland M E Zelazko S D Rosenzweig 《Medical mycology》2006,44(8):749-753
Infections due to Penicillium species other than P.marneffei are rare. We identified a boy with X-linked chronic granulomatous disease (X-CGD) with a pulmonary nodule and adjacent rib osteomyelitis caused by Penicillium piceum. The only sign of infection was an elevated sedimentation rate. P. piceum was isolated by fine needle aspirate and from excised infected tissues. Surgical removal and one year of voriconazole treatment were very well tolerated and led to complete recovery. Microbiological, microscopic and molecular studies support the fungal diagnosis. P. piceum should be considered as a relevant pathogen in immunocompromised patients. 相似文献
5.
Dr. Arni Raghavendrarao Raghuram M.Ch. Subbiah Kumar MD Kathamuthu Balamurugan DA Arulmurugan DA Ramiah Krishnan M.Ch. Perichiappan Sivakami BS Eluvathingal Varghese John M.Ch. 《Indian Journal of Thoracic and Cardiovascular Surgery》2006,22(3):178-181
Background Beating heart surgery has now become the commonest technique of doing Coronary Artery Bypass Graft Surgery (CABG) in our country.
It is being used even in such high risk situations like diffuse coronary disease and Critical Left Main stem Stenosis (LMCS)
with good results. The aim of this study is to retrospectively review our results in Off-Pump Coronary Artery Bypass Surgery
(OPCAB) in patients with critical left main stem stenosis.
Methods This study is a retrospective analysis of the data of patients who underwent primary coronary artery bypass surgery. During
the period from April 2003 to September 2005 a total of 64 patients underwent OPCAB procedure for critical LMCS. During the
same period 10 patients underwent CABG on Cardio Pulmonary Bypass (CPB). The age range was 36–77yrs. The sex distribution
was M: F 53∶10. Ten patients were done as emergency. 2 of them were on Intra Aortic Balloon Pump (IABP) support preoperatively.
10 patients were high risk with a Euro score of ≥5.
Results Left Internal Mammary Artery (LIMA) was used in 78% of cases. Average grafts per patient was 2.96. The median ventilation
time was 5.91 hrs. New IABP insertion in postoperative period was required in 1 patient. One patient was reexplored for bleeding.
There was one perioperative myocardial infarction. 57% of patients did not need any blood transfusion. There was no conversion
to CPB. There was no operative mortality. Inotropes were used in ten cases.
Conclusions OPCAB is a safe method of revascularization in patients with critical LMCS. Preoperative IABP is useful in patients with cardiogenic
shock. However, there is a place for CPB in patients needing additional procedures like Mitral Valve repair (MV repair) or
Dor's procedure or when the vessels are very diffusely diseased. Those patients who are unstable despite IABP support may
be managed by Beating heart On Pump (BHOP) technique. 相似文献
6.
7.
PURPOSE: To examine longitudinal changes in mood and empathy over the course of the internal medicine residency. METHOD: The authors conducted a cohort study of 61 residents who completed the Profile of Mood States (POMS) and the Interpersonal Reactivity Index (IRI) at six time points during their internal medicine residency at a university-based program. (POMS was administered five times, and IRI was administered six times.) The main outcomes measured were trends in mood disturbances and multiple domains of empathy over the three-year residency, and comparisons to norms. RESULTS: Response rates varied from Time 1 to Time 6 (98%, 72%, 79%, 79%, 94%, and 95%, respectively). Interns had better scores on four POMS subscales: Depression-Dejection (p = .0031), Anger-Hostility (p < .0001), Fatigue-Inertia (p < .0001), and Vigor-Activity (p < .0001) compared with later administrations, especially midinternship. By the end of residency all POMS scores were returning towards baseline (effects sizes in the .20 s), but only depression was no longer significantly different. IRI scores showed the decline in Empathic Concern remained over residency whereas Personal Distress peaked midinternship year but approached baseline at the end of residency. Compared with the general population, the graduating residents were less tense, depressed, and confused. Personal Distress was significantly lower than the norm group. CONCLUSIONS: Internal medicine residency presents challenges resulting in common mood disturbances. Although graduating residents appear to be better off than the population norms, some domains of their mood disturbances and empathy never fully recover from their internship year. 相似文献
8.
9.
10.
氟西汀与阿米替林治疗105例抑郁障碍病人的双盲对照试验 总被引:6,自引:4,他引:2
目的:评价国产氟西汀的抗抑郁作用及安全性。方法:采用随机、双盲对照、多中心研究,分为国产氟西汀组57例(男性22例,女性35例;年龄40±s13a),口服氟西汀20mg,qd,阿米替林57例(男性27例,女性30例;年龄40±14a),口服阿米替林75mg,bid,疗程6wk。结果:氟西汀治疗抑郁障碍的疗效与阿米替林相当,总有效率分别为85%及92%(P>0.05);氟西汀组的主要副作用有口干、便秘、恶心、心动过速等,但较之阿米替林程度轻且发生率低。结论:氟西汀的抗抑郁作用与阿米替林相当,副作用少,服用方便。 相似文献