全文获取类型
收费全文 | 20125篇 |
免费 | 1344篇 |
国内免费 | 84篇 |
专业分类
耳鼻咽喉 | 183篇 |
儿科学 | 724篇 |
妇产科学 | 657篇 |
基础医学 | 2799篇 |
口腔科学 | 412篇 |
临床医学 | 2627篇 |
内科学 | 3676篇 |
皮肤病学 | 367篇 |
神经病学 | 1983篇 |
特种医学 | 603篇 |
外科学 | 1698篇 |
综合类 | 286篇 |
现状与发展 | 1篇 |
一般理论 | 37篇 |
预防医学 | 2381篇 |
眼科学 | 363篇 |
药学 | 1174篇 |
中国医学 | 48篇 |
肿瘤学 | 1534篇 |
出版年
2023年 | 165篇 |
2022年 | 244篇 |
2021年 | 452篇 |
2020年 | 325篇 |
2019年 | 460篇 |
2018年 | 514篇 |
2017年 | 439篇 |
2016年 | 416篇 |
2015年 | 589篇 |
2014年 | 712篇 |
2013年 | 1026篇 |
2012年 | 1481篇 |
2011年 | 1510篇 |
2010年 | 808篇 |
2009年 | 703篇 |
2008年 | 1270篇 |
2007年 | 1255篇 |
2006年 | 1271篇 |
2005年 | 1241篇 |
2004年 | 1138篇 |
2003年 | 1125篇 |
2002年 | 1082篇 |
2001年 | 298篇 |
2000年 | 229篇 |
1999年 | 233篇 |
1998年 | 245篇 |
1997年 | 187篇 |
1996年 | 145篇 |
1995年 | 139篇 |
1994年 | 118篇 |
1993年 | 111篇 |
1992年 | 168篇 |
1991年 | 118篇 |
1990年 | 112篇 |
1989年 | 96篇 |
1988年 | 91篇 |
1987年 | 82篇 |
1986年 | 95篇 |
1985年 | 71篇 |
1984年 | 72篇 |
1983年 | 84篇 |
1982年 | 97篇 |
1981年 | 67篇 |
1980年 | 59篇 |
1979年 | 56篇 |
1978年 | 47篇 |
1977年 | 36篇 |
1976年 | 25篇 |
1974年 | 30篇 |
1972年 | 24篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
Mary Ellen Turner Kanwal Kher Tamara Rakusan Lawrence D’Angelo Sudesh Kapur Dena Selby Patricio E. Ray 《Pediatric nephrology (Berlin, Germany)》1997,11(2):161-163
We describe the clinical and pathological findings of the hemolytic uremic syndrome (HUS) in two children with human immunodeficiency
virus (HIV) infection. Both patients presented with microangiopathic hemolytic anemia, thrombocytopenia, and subsequently
developed renal failure. The diagnosis of HUS was confirmed by renal histopathology in both patients. None of these children
presented with bloody diarrhea, evidence of circulating antibody response to Escherichia coli O157 lipopolysaccharide, or other known risk factors for HUS, except for the presence of HIV infection. Each patient was
treated with intravenous plasma infusion and renal replacement therapy. Their clinical course was characterized by non-oliguria
and lack of significant hypertension throughout the acute phase of the disease. Despite these favorable clinical parameters,
both patients developed end-stage renal failure. The etiology of this atypical HUS characterized by poor renal survival remains
unknown and the role of HIV infection in its pathogenesis, although possible, is unclear.
Received March 5, 1996; received in revised form and accepted October 15, 1996 相似文献
32.
33.
34.
35.
Mo Therese Hannah Ellen R. Gritz David K. Wellisch Pat Fobair Richard T. Hoppe Joan R. Bloom Guo-Wen Sun Anna Varghese Malcolm D. Cosgrove David Spiegel 《Psycho-oncology》1992,1(2):89-103
This study compares the effects of the cancer experience on various aspects of marital and sexual functioning (e.g., communication, emotional support, body image, sexual satisfaction and frequency) for two groups of long-term cancer survivors (testicular cancer and Hodgkin's disease) and their spouses. Comparisons between the two patient groups showed significantly more survivors of Hodgkin's disease than testicular cancer reporting the emergence of special issues and changes in the marital relationship. No differences emerged between the spouse groups on sexual functioning variables; however, spouses of survivors of Hodgkin's disease were more likely than spouses of survivors of testicular cancer to report the development of special issues and communication difficulties. A substantial proportion of both survivor groups disclosed negative changes in body image and sexual frequency. Majorities of both survivors and spouses acknowledged that the illness had drawn them closer together. When representative marital/sexual functioning variables were used to predict Family Environment Scale (FES) scores for survivors and for spouses, changes in the spouse's importance, influence of the illness on the relationship, and changes in sexual frequency emerged as significant predictors. The clinical significance of long-term changes in marital and sexual functioning for the couple and the need for therapeutic interventions are discussed. 相似文献
36.
We examined two recently developed measures of positive automatic thought, the Positive Automatic Thoughts Questionnaire (ATQ-P)
and the Automatic Thoughts Questionnaire—Revised (ATQ-RP). Internal consistency, concurrent validity, and convergent and discriminant
validity were addressed. Two hundred one undergraduates completed self-report measures of positive automatic thoughts, negative
automatic thoughts, depressive symptoms, anxiety symptoms, and positive affectivity. The ATQ-P and ATQ-RP both showed high
internal consistency, strong negative associations with depressive symptoms, specificity to depressive symptoms rather than
anxiety symptoms, an average state-of-mind (SOM) ratio in the positive dialogue range, and a stronger relation with each other
than with a measure of positive affectivity. The only notable difference between the measures was a significantly lower mean
score (correcting for number of items) on the ATQ-RP.
This paper is based on a thesis completed by the first author, under the supervision of the second author, in partial fulfillment
of the requirements for the Master of Arts degree at American University. We are grateful to thesis committee members Lorah
Dorn and Jim Gray for feedback on this material. 相似文献
37.
近年来由于训练强度不断增大,高水平运动员心律失常的发生率显著增加。本文研究资料表明,男心律失常组安静时心搏量明显大于正常组(P<0.05),而运动后心搏量降低(正常组心搏量增加),说明心律失常的运动员心脏储备能力差,心脏泵血功能降低,应予慎重对待。 相似文献
38.
Dr. Yen-Chun Lin MD Jiahn-Shing Lee MD Shiu-Chen Wu MD Ling-Yuh Kao MD Chia-Yun Li MD Ken-Kuo Lin MD 《Annals of Ophthalmology》2003,35(1):19-24
This study analyzed the feasibility of fitting keratoconus-affected corneas with nonkeratoconus rigid gas-permeable (RGP)
contact lenses. We retrospectively studied patients with a diagnosis of keratoconus in the past 10 years who were fitted successfully
with nonkeratoconus RGP lenses by the same physician. Results confirmed nonkeratoconus RGP lenses as the first-line correction
tool. Additionally, we found a simple equation to speed the choice of the base curves of the lenses.
The authors have stated that they do not have a significant financial interest or other relationship with any product manufacturer
or provider of services discussed in this article. 相似文献
39.
Occupational therapy is based on core values of altruism, equality, and honoring the dignity of others. Embedded in these values is the ever-present negotiation of power. To honor the concern for the welfare of others, researchers are challenged to think about issues of power throughout the research process. This paper identifies dilemmas and raises questions researchers might ask themselves as they struggle to share power in the interpretive research process. 相似文献
40.
Hein Heidbüchel Domenico Corrado Allessandro Biffi Ellen Hoffmann Nicole Panhuyzen-Goedkoop Jan Hoogsteen Pietro Delise Per Ivar Hoff Antonio Pelliccia 《European journal of cardiovascular prevention and rehabilitation》2006,13(5):676-686
This consensus paper on behalf of the Study Group on Sports Cardiology of the European Society of Cardiology follows a previous one on guidelines for sports participation in competitive and recreational athletes with supraventricular arrhythmias and pacemakers. The question of imminent life-threatening arrhythmias is especially relevant when some form of ventricular rhythm disorder is documented, or when the patient is diagnosed to have inherited a pro-arrhythmogenic disorder. Frequent ventricular premature beats or nonsustained ventricular tachycardia may be a hallmark of underlying pathology and increased risk. Their finding should prompt a thorough cardiac evaluation, including both imaging modalities and electrophysiological techniques. This should allow distinguishing idiopathic rhythm disorders from underlying disease that carries a more ominous prognosis. Recommendations on sports participation in inherited arrhythmogenic conditions and asymptomatic gene carriers are also discussed: congenital and acquired long QT syndrome, short QT syndrome, Brugada syndrome, catecholaminergic polymorphic ventricular tachycardia, arrhythmogenic right ventricular cardiomyopathy and other familial electrical disease of unknown origin. If an implantable cardioverter defibrillator is indicated, it is no substitute for the guidelines relating to the underlying pathology. Moreover, some particular recommendations for patients/athletes with an implantable cardioverter defibrillator are to be observed. 相似文献