全文获取类型
收费全文 | 2397篇 |
免费 | 148篇 |
国内免费 | 6篇 |
专业分类
耳鼻咽喉 | 14篇 |
儿科学 | 46篇 |
妇产科学 | 31篇 |
基础医学 | 408篇 |
口腔科学 | 91篇 |
临床医学 | 236篇 |
内科学 | 484篇 |
皮肤病学 | 22篇 |
神经病学 | 236篇 |
特种医学 | 77篇 |
外科学 | 223篇 |
综合类 | 16篇 |
一般理论 | 2篇 |
预防医学 | 197篇 |
眼科学 | 45篇 |
药学 | 214篇 |
肿瘤学 | 209篇 |
出版年
2023年 | 16篇 |
2022年 | 17篇 |
2021年 | 32篇 |
2020年 | 37篇 |
2019年 | 53篇 |
2018年 | 53篇 |
2017年 | 46篇 |
2016年 | 51篇 |
2015年 | 51篇 |
2014年 | 84篇 |
2013年 | 116篇 |
2012年 | 143篇 |
2011年 | 158篇 |
2010年 | 87篇 |
2009年 | 93篇 |
2008年 | 145篇 |
2007年 | 127篇 |
2006年 | 149篇 |
2005年 | 164篇 |
2004年 | 115篇 |
2003年 | 98篇 |
2002年 | 112篇 |
2001年 | 31篇 |
2000年 | 40篇 |
1999年 | 42篇 |
1998年 | 21篇 |
1997年 | 20篇 |
1996年 | 28篇 |
1995年 | 26篇 |
1994年 | 18篇 |
1993年 | 16篇 |
1992年 | 22篇 |
1991年 | 23篇 |
1990年 | 16篇 |
1989年 | 20篇 |
1988年 | 16篇 |
1987年 | 20篇 |
1986年 | 16篇 |
1985年 | 13篇 |
1984年 | 15篇 |
1983年 | 21篇 |
1982年 | 12篇 |
1979年 | 13篇 |
1976年 | 9篇 |
1974年 | 8篇 |
1972年 | 12篇 |
1968年 | 9篇 |
1928年 | 9篇 |
1927年 | 8篇 |
1926年 | 10篇 |
排序方式: 共有2551条查询结果,搜索用时 15 毫秒
1.
2.
Hoilund-Carlsen Poul F.; Johansen Allan; Vach Werner; Haghfelt Torben 《European heart journal》2006,27(9):1128-1129
We thank Geluk and Zijlstra for their kind words as well astheir considerations and proposals. The latter hits right intothe heart of the issue: should one stick to the anatomicparadigm urging us to detect and treat coronary stenoses andcalcifications rather than follow 相似文献
3.
Fixation of displaced femoral neck fractures: A comparison between sliding screw plate and four cancellous bone screws 总被引:1,自引:0,他引:1
Frank Madsen Frank Linde Erik Andersen Hanne Birke Inge Hvass Torben D. Poulsen 《Acta orthopaedica》1987,58(3):212-216
In a prospective, randomized trial, 104 consecutive patients with displaced femoral neck fractures were allocated either to fixation with a sliding screw plate or 4 ASIF cancellous bone screws. The patients were reexamined at fixed intervals to determine the time of union. The 2-year-cumulated rate of union was 64 per cent in the plate group and 84 per cent in the screw group. 相似文献
4.
5.
6.
P S Douglas K F Moos W S Hislop 《The British journal of oral & maxillofacial surgery》1992,30(6):382-386
Five female patients with Klippel-Feil syndrome (KFS) are presented with abnormal bony masses in the mandibular ramus region. The features of KFS are described with assessment and treatment of the five patients. Although congenital duplication of mandibular rami in KFS has been previously documented, we believe this is the first series of patients with this deformity. 相似文献
7.
Mortality Rates and Predictors of Mortality Among Late-Middle-Aged and Older Substance Abuse Patients 总被引:2,自引:0,他引:2
Rudolf H. Moos Penny L. Brennan Jennifer R. Mertens 《Alcoholism, clinical and experimental research》1994,18(1):187-195
This study describes mortality rates and predictors of mortality among late-middle-aged and older (55+) substance abuse inpatients ( n = 21, 139) in Department of Veterans Affairs (VA) Medical Centers in the 4 years after an index episode of care. A total of 24% of the patients died; this mortality rate was 2.64 times higher than expected. Predictors of earlier mortality included older age and nonmarried status, alcohol psychosis and organic brain disorder diagnoses, and several medical diagnoses, including neoplasms, liver cirrhosis, respiratory, endocrine and metabolic, and blood system disorders. Three proxy indicators of illness severity also predicted mortality: more prior inpatient and outpatient medical care and an index episode in an extended care unit. In contrast, more prior outpatient mental health care and remitted status predicted lower mortality. These diagnostic and treatment indicators can be used to identify patients at heightened risk for premature mortality. Moreover, they show that intensive mental health aftercare and remission of substance abuse may delay mortality, even among older patients who have longstanding substance abuse problems. 相似文献
8.
G. Geussová Dr. J. Pknicová J. apková P. Kaláb J. Moos V. V. Philimonenko and P. Hozák 《Andrologia》1997,29(5):261-268
Summary. Monoclonal antibodies Ds-1 and Ds-2 specifically labelling dog sperm acrosome were prepared by immunization of mice with acetic acid extracts of dog spermatozoa. Electron microscopy and indirect immunofluorescence localized the site of Ds-1 and Ds-2 proteins inside the acrosomal vesicle. Ds-1 antibody detected 55, 76, 115, 120 and 190kDa proteins under non-reducing conditions, and 73 kDa and 54 kDa proteins after reduction (p73/Ds-1 and p54/Ds-1). 92 kDa and 40 kDa proteins recognized by Ds-2 (p92/Ds-2 and p40/Ds-2) migrated at > 200 kDa in the absence of reducing agent. In vivo , p73/Ds-1 and p54/Ds-1 are therefore likely to be present both in free and complexed form, while all of p92/Ds-2 and p40/Ds-2 form disulfide-bonded complexes. Decrease in the rate of acrosomes stained with Ds-1 and Ds-2 was correlated with the progress of capacitation resulting in the increased rate of spontaneous acrosome reactions, as suggested by a dramatic effect of A23187. Monoclonal antibody to boar acrosin (ACR-2) recognized dog sperm acrosin homologue. A higher rate of ACR-2-negative spermatozoa was observed after capacitation and A23187 treatment compared to Ds-1 and Ds-2, indicating that proteins recognized by Ds-1 and Ds-2 are localized in a specific compartment of acrosome, distinct from acrosin and possibly representing fraction of acrosomal matrix. 相似文献
9.
Lise Pedersen Susanne Holck Torben Schiødt Karin Zedeler Henning T. Mouridsen 《Breast cancer research and treatment》1989,14(1):91-99
Summary One hundred thirty-one breast carcinomas with medullary features, registered in the Danish Breast Cancer Cooperative Group from 1977–1982, have been histopathologically reviewed by two senior pathologists and classified as typical medullary carcinoma (TMC), atypical medullary carcinoma (AMC), and non-medullary carcinoma (NMC). Diagnostic criteria were based on those put forward by Ridolfiet al. and Fisheret al. The procedure was repeated with an interval of about one year by both pathologists. The diagnostic interobserver agreement was 72% with a Kappa of 0.55. The intraobserver agreement was 77% and 63% with Kappa values of 0.64 and 0.44, respectively. To see whether the observed inter- and intraobserver variability had any prognostic implications, diagnostic subgroups for both pathologists were analyzed with Kaplan Meier plots for recurrence-free survival (RFS) and with log rank tests. In the first evaluation pathologist 1 segregated a group of TMC with a significantly better RFS than for the NMC group, and pathologist 2 segregated a group of TMC with a corresponding strong trend. These findings could not, however, be reproduced in the second evaluation. The study indicates that the criteria of TMC and AMC as proposed by Ridolfiet al. need to be sharpened and simplified in order to reduce inter-and intraobserver variability. Larger studies with a control group of infiltrating ductal carcinomas are mandatory to elucidate the clinical importance of the diagnoses of Typical and Atypical Medullary Carcinoma of the breast. 相似文献
10.