全文获取类型
收费全文 | 4019篇 |
免费 | 246篇 |
国内免费 | 120篇 |
专业分类
耳鼻咽喉 | 17篇 |
儿科学 | 271篇 |
妇产科学 | 52篇 |
基础医学 | 363篇 |
口腔科学 | 99篇 |
临床医学 | 533篇 |
内科学 | 813篇 |
皮肤病学 | 118篇 |
神经病学 | 115篇 |
特种医学 | 672篇 |
外科学 | 396篇 |
综合类 | 251篇 |
预防医学 | 223篇 |
眼科学 | 35篇 |
药学 | 198篇 |
4篇 | |
中国医学 | 32篇 |
肿瘤学 | 193篇 |
出版年
2022年 | 33篇 |
2021年 | 46篇 |
2020年 | 41篇 |
2019年 | 22篇 |
2018年 | 50篇 |
2017年 | 43篇 |
2016年 | 40篇 |
2015年 | 74篇 |
2014年 | 98篇 |
2013年 | 132篇 |
2012年 | 111篇 |
2011年 | 119篇 |
2010年 | 177篇 |
2009年 | 187篇 |
2008年 | 118篇 |
2007年 | 166篇 |
2006年 | 130篇 |
2005年 | 104篇 |
2004年 | 72篇 |
2003年 | 66篇 |
2002年 | 73篇 |
2001年 | 72篇 |
2000年 | 55篇 |
1999年 | 55篇 |
1998年 | 211篇 |
1997年 | 230篇 |
1996年 | 205篇 |
1995年 | 175篇 |
1994年 | 155篇 |
1993年 | 145篇 |
1992年 | 40篇 |
1991年 | 54篇 |
1990年 | 49篇 |
1989年 | 84篇 |
1988年 | 90篇 |
1987年 | 81篇 |
1986年 | 78篇 |
1985年 | 77篇 |
1984年 | 45篇 |
1983年 | 38篇 |
1982年 | 40篇 |
1981年 | 39篇 |
1980年 | 41篇 |
1977年 | 32篇 |
1976年 | 39篇 |
1959年 | 23篇 |
1958年 | 32篇 |
1956年 | 30篇 |
1955年 | 46篇 |
1954年 | 38篇 |
排序方式: 共有4385条查询结果,搜索用时 109 毫秒
2.
JM Martín† L Calduch† C Monteagudo‡ I Molina† D Ramón† V Alonso† E Jordᆠ《Journal of the European Academy of Dermatology and Venereology》2006,20(4):428-431
Cutaneous plasmacytosis is a rare disorder characterized by a benign proliferation of mature plasma cells that appears as multiple dark-brown to purplish skin lesions, often associated with polyclonal hypergammaglobulinaemia. We present the case of a 55-year-old Caucasian man who suffered from a cutaneous plasmacytosis associated with two different carcinomas. Cutaneous plasmacytosis seems to be a reactive process because most cases reported are not associated with any apparent underlying disease. Nevertheless, because few reported cases were associated with malignancies, screening of additional neoplasms would be justified. 相似文献
3.
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
4.
5.
6.
7.
8.
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
9.
JM Vilanova J Figueras-Aloy J Roselló G Gómez E Gelpí R Jiménez 《Acta paediatrica (Oslo, Norway : 1992)》1998,87(5):588-592
The aim of this study was to evaluate the cerebral synthesis of eicosanoids in the asphyctic newborn and to investigate the relation between the prostanoid profiles in cerebrospinal fluid (CSF) and the appearance and severity of hypoxic-ischaemic encephalopathy (HIE). Levels of 6-keto-PGF 1-α, TXB2 , PGE2 and PGF2-α in CSF were measured in 40 full term newborns during the first day of life. Thirty of these newborns had birth asphyxia and were divided into three groups: 10 without HIE, 12 with mild HIE and 8 with moderate-severe HIE. They were compared to a control group of 10 non-hypoxic newborns. Determinations of the metabolites in CSF were performed by RIA and expressed as pg/ml (mean ± SD). The CSF TXB2 (thromboxane A2 metabolite) in asphyxiated newborns was always higher than in the control group (28.12 ± 10.6), and related to the severity of HIE ( p = 0:005): without HIE (50.84 ± 16.4; p = 0:02), mild HIE (80.65 ± 12.64; p ± 0:01) and moderate-severe HIE (178.14 ± 20.5; p < 0:01). The CSF 6-keto-PGF 1-α (prostacyclin metabolite) in asphyxiated newborns was always higher than in the control group (80.55 ± 12.56), but indirectly related to the severity of HIE: without HIE (240.95 ± 28.12; p < 0:01), mild HIE (183.65 ± 30.1; p < 0:01) and moderate-severe HIE (140.55 ± 25.12; p < 0:01). In the moderate-severe HIE group, the increase in TXB2 was higher than the rise in 6-keto-PGF 1-α . 相似文献
10.