全文获取类型
收费全文 | 64093篇 |
免费 | 4505篇 |
国内免费 | 212篇 |
专业分类
耳鼻咽喉 | 799篇 |
儿科学 | 1409篇 |
妇产科学 | 843篇 |
基础医学 | 8154篇 |
口腔科学 | 954篇 |
临床医学 | 6816篇 |
内科学 | 13873篇 |
皮肤病学 | 789篇 |
神经病学 | 6404篇 |
特种医学 | 2187篇 |
外国民族医学 | 5篇 |
外科学 | 11475篇 |
综合类 | 625篇 |
一般理论 | 47篇 |
预防医学 | 4371篇 |
眼科学 | 1232篇 |
药学 | 4407篇 |
中国医学 | 71篇 |
肿瘤学 | 4349篇 |
出版年
2024年 | 64篇 |
2023年 | 499篇 |
2022年 | 872篇 |
2021年 | 2008篇 |
2020年 | 1211篇 |
2019年 | 1797篇 |
2018年 | 2188篇 |
2017年 | 1534篇 |
2016年 | 1632篇 |
2015年 | 1875篇 |
2014年 | 2703篇 |
2013年 | 3363篇 |
2012年 | 5252篇 |
2011年 | 5450篇 |
2010年 | 2929篇 |
2009年 | 2690篇 |
2008年 | 4383篇 |
2007年 | 4475篇 |
2006年 | 4262篇 |
2005年 | 4068篇 |
2004年 | 3628篇 |
2003年 | 3462篇 |
2002年 | 3089篇 |
2001年 | 418篇 |
2000年 | 315篇 |
1999年 | 386篇 |
1998年 | 615篇 |
1997年 | 481篇 |
1996年 | 379篇 |
1995年 | 326篇 |
1994年 | 288篇 |
1993年 | 270篇 |
1992年 | 199篇 |
1991年 | 159篇 |
1990年 | 128篇 |
1989年 | 110篇 |
1988年 | 114篇 |
1987年 | 96篇 |
1986年 | 90篇 |
1985年 | 81篇 |
1984年 | 118篇 |
1983年 | 97篇 |
1982年 | 108篇 |
1981年 | 99篇 |
1980年 | 112篇 |
1979年 | 46篇 |
1978年 | 47篇 |
1977年 | 45篇 |
1976年 | 33篇 |
1974年 | 31篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
Christopher R. LaFever 《Death Studies》2020,44(12):819-822
4.
Christopher N. Cooley Tyler J. Beranek Matthew A. Warpinski Robert Alexander Amanda O. Esquivel 《The American journal of emergency medicine》2019,37(2):199-203
Introduction
In the United States there has been a large increase in participation in lacrosse for both males and females. The purpose of this study was to analyze the number of head injuries, injury rates (calculated using the reported number of participants) and types of head injuries that are seen in emergency departments in the United States.Methods
We compared injuries between male and female lacrosse participants. This was a retrospective study using a publicly available database produced by the US Consumer Product Safety Commission and information about lacrosse participation from US Lacrosse.Results
A linear regression was performed and showed a positive correlation between number of head injuries to males and time from 2002 to 2010 (R2?=?0.823; p?=?0.001). While the number of injuries to the head in female lacrosse participants was not significant. There was a negative correlation between the number of head injuries to males from 2010 to 2016 (R2?=?0.800; p?=?0.007), but again, there was no significance for female injury count (R2?=?0.417; p?=?0.117). Other significant differences between head injuries in males and females included the mechanism of injury and the type of injury recorded.Conclusion
The most recent data from 2010 to 2016, suggest that both males and females have had a decrease in injury rate. However the total number of female head injuries is not significantly decreasing and as the sport continues to grow there will likely be more total head injuries and visits to the emergency department. 相似文献5.
Amy Y. Zhang Christopher Burant Alex Z. Fu Gerald Strauss Donald R. Bodner Lee Ponsky 《Journal of psychosocial oncology》2020,38(2):210-227
AbstractPurpose: We examined underlying psychosocial processes of a behavioral treatment for urinary incontinence (UI) of prostate cancer survivors.Design: Secondary analysis of data collected from a clinical trial.Sample: Two hundred forty-four prostate cancer survivors who participated in a clinical trial of behavioral intervention to UI as intervention or control subjects.Methods: The participants had a 3-month behavioral intervention or usual care and were followed up for an additional 3?months. They were assessed at baseline, 3, and 6?months. Latent growth curve models were performed to examine trajectories of each study variable and relationships among the variables.Findings: Increasing self-efficacy and social support were significantly and independently associated with more reduction of urinary leakage frequency over time.Implications for psychosocial oncology: Providing problem-solving skills and social support, including peer support, are essential for empowering patients to reduce UI. 相似文献
6.
7.
8.
Firouzan Massoomi Pharm.D. John Savage Pharm.D. Christopher J. Destache Pharm.D. 《Pharmacotherapy》1993,13(1):46-59
Omeprazole is a member of a new class of substituted benzimidazoles. These agents inhibit the proton pump in the gastric parietal cell, blocking the final step in the gastric acid secretory pathway. Omeprazole has been investigated for the treatment of gastric ulcer, duodenal ulcer, gastroesophageal reflux, and various hypersecretory states. The prolonged inhibition of gastric acid secretion allows for once-daily dosing in patients with peptic ulcer disease and gastroesophageal reflux, and once- or twice-daily dosing in patients with Zollinger-Ellison syndrome. Compared with currently available therapies, omeprazole is well tolerated and demonstrates a more rapid ulcer healing rate. It is superior to conventional therapies in the treatment of Zollinger-Ellison syndrome. Side effects are infrequent when the drug is used for the short-term management of ulcers. 相似文献
9.
Christopher Gillberg 《Journal of autism and developmental disorders》1991,21(1):61-77
Autism is associated with epilepsy. One third of the population of people with autism have developed seizures in early adult life. In spite of this well-known association, little is known about the treatment of epilepsy in autism. This paper reviews the sparse literature and reports a systematic case-record study of the treatment of epilepsy in autism. Some practical guidelines for clinicians are provided. Research in the field of epilepsy in autism is highly warranted.This study has been supported by a grant from The Commission for Social Research, Sweden, No. E 88/170:2. 相似文献
10.