全文获取类型
收费全文 | 57459篇 |
免费 | 3983篇 |
国内免费 | 111篇 |
专业分类
耳鼻咽喉 | 436篇 |
儿科学 | 2269篇 |
妇产科学 | 2041篇 |
基础医学 | 6742篇 |
口腔科学 | 627篇 |
临床医学 | 9986篇 |
内科学 | 10140篇 |
皮肤病学 | 903篇 |
神经病学 | 5243篇 |
特种医学 | 1062篇 |
外国民族医学 | 33篇 |
外科学 | 5118篇 |
综合类 | 672篇 |
一般理论 | 86篇 |
预防医学 | 8253篇 |
眼科学 | 612篇 |
药学 | 3197篇 |
1篇 | |
中国医学 | 92篇 |
肿瘤学 | 4040篇 |
出版年
2023年 | 337篇 |
2022年 | 424篇 |
2021年 | 1128篇 |
2020年 | 769篇 |
2019年 | 1277篇 |
2018年 | 1395篇 |
2017年 | 1000篇 |
2016年 | 1118篇 |
2015年 | 1220篇 |
2014年 | 1689篇 |
2013年 | 2781篇 |
2012年 | 3986篇 |
2011年 | 4290篇 |
2010年 | 2305篇 |
2009年 | 2117篇 |
2008年 | 3772篇 |
2007年 | 4271篇 |
2006年 | 4039篇 |
2005年 | 3969篇 |
2004年 | 3803篇 |
2003年 | 3584篇 |
2002年 | 3363篇 |
2001年 | 432篇 |
2000年 | 320篇 |
1999年 | 440篇 |
1998年 | 735篇 |
1997年 | 580篇 |
1996年 | 496篇 |
1995年 | 424篇 |
1994年 | 402篇 |
1993年 | 399篇 |
1992年 | 287篇 |
1991年 | 251篇 |
1990年 | 243篇 |
1989年 | 194篇 |
1988年 | 199篇 |
1987年 | 203篇 |
1986年 | 179篇 |
1985年 | 200篇 |
1984年 | 224篇 |
1983年 | 222篇 |
1982年 | 279篇 |
1981年 | 259篇 |
1980年 | 209篇 |
1979年 | 140篇 |
1978年 | 121篇 |
1977年 | 142篇 |
1976年 | 113篇 |
1975年 | 94篇 |
1973年 | 94篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
Hanna Lee Mary K. Tan Andrew T. Yan Paul Angaran Paul Dorian Claudia Bucci Jean C. Gregoire Alan D. Bell Martin S. Green Peter L. Gross Allan Skanes Charles R. Kerr L. Brent Mitchell Jafna L. Cox Vidal Essebag Brett Heilbron Krishnan Ramanathan Carl Fournier Shaun G. Goodman 《The Canadian journal of cardiology》2019,35(2):160-168
Background
Physicians treating nonvalvular atrial fibrillation (AF) assess stroke and bleeding risks when deciding on anticoagulation. The agreement between empirical and physician-estimated risks is unclear. Furthermore, the association between patient and physician sex and anticoagulation decision-making is uncertain.Methods
We pooled data from 2 national primary care physician chart audit databases of patients with AF (Facilitating Review and Education to Optimize Stroke Prevention in Atrial Fibrillation and Coordinated National Network to Engage Physicians in the Care and Treatment of Patients with Atrial Fibrillation Chart Audit) with a combined 1035 physicians (133 female, 902 male) and 10,927 patients (4567 female and 6360 male).Results
Male physicians underestimated stroke risk in female patients and overestimated risk in male patients. Female physicians estimated stroke risk well in female patients but underestimated the risk in male patients. Risk of bleeding was underestimated in all. Despite differences in risk assessment by physician and patient sex, > 90% of patients received anticoagulation across all subgroups. There was modest agreement between physician estimated and calculated (ie, CHADS2 score) stroke risk: Kappa scores were 0.41 (0.35-0.47) for female physicians and 0.34 (0.32-0.36) for male physicians.Conclusions
Our study is the first to examine the association between patient and physician sex influences and stroke and bleeding risk estimation in AF. Although there were differences in agreement between physician estimated stroke risk and calculated CHADS2 scores, these differences were small and unlikely to affect clinical practice; further, despite any perceived differences in the accuracy of risk assessment by sex, most patients received anticoagulation. 相似文献22.
23.
John P. Sundberg Kathleen A. Silva Victoria E. Kennedy John J. Wilson Nicholas E. Gott Beth A. Sundberg Derry C. Roopenian 《Experimental dermatology》2019,28(9):1091-1093
2‐deoxy D‐glucose (2DG) was tested for efficacy in treating alopecia areata using the C3H/HeJ skin graft model. 2DG has proven to be efficacious in treatment of various mouse models of autoimmunity with minimal serious side effects noted. This agent has been shown to normalize abnormally activated T‐cell populations while also preventing cell surface expression of NKG2D; key factors defining alopecia areata disease progression. Daily oral ingestion of 2DG via drinking water to mice with patchy or diffuse alopecia areata for 16 weeks failed to prevent expansion of alopecia or cause regrowth of hair in treated mice. Histologically, there were no differences between treated and control groups. These results indicate that, while 2DG is effective for some autoimmune diseases, it was not efficacious for the cell‐mediated autoimmune mouse disease, alopecia areata. 相似文献
24.
Joseph D. Westaby Susanna T. E. Cooper Khari A. Edwards Robert H. Anderson Mary N. Sheppard 《Clinical anatomy (New York, N.Y.)》2020,33(3):394-404
Congenital heart disease is a rare but important finding in adults who experience sudden death. Examination of the congenitally malformed heart has historically been considered esoteric and best left to those with expertise. The Cardiac Risk in the Young cardiovascular pathology laboratory based at St George's University of London has now received over 6,000 cases. Of these, 21 congenitally malformed hearts were retained for research and educational purposes. Hearts were assessed using sequential segmental analysis, and causes of death were adjudicated based on thorough macroscopic examination and histology. Congenital malformations that were encountered included atrial septal defects, ventricular septal defects, tetralogy of Fallot, and transposition of the great arteries in both its regular and congenitally corrected variants. Findings also included hearts with mirror-imaged and isomeric atrial appendages. Direct causes of death included myocardial fibrosis, pulmonary hypertension, and hemorrhage. A small but notable proportion did not reveal a substrate for arrhythmia, raising the question of whether the terminal event was due to the congenital heart disease itself, or an underlying channelopathy. Here, we demonstrate the value of simple sequential segmental analysis in describing and categorizing the cases, with the concept of the “morphological method” serving to identify the distinguishing features of the cardiac components. Clin. Anat. 33:394–404, 2020. © 2019 Wiley Periodicals, Inc. 相似文献
25.
26.
Greaney Mary L. Cohen Steven A. Blissmer Bryan J. Earp Jacob E. Xu Furong 《Quality of life research》2019,28(12):3249-3257
Quality of Life Research - Health-related quality of life (HRQoL) is an important indicator of population health, yet no age-specific trend analyses in HRQoL have been conducted with a nationally... 相似文献
27.
28.
29.
Beth Sundstrom 《Health communication》2016,31(1):91-101
This study employed qualitative methods, conducting 44 in-depth interviews with biological mothers of newborns to understand women’s perceptions and use of new media, mass media, and interpersonal communication channels in relation to health issues. Findings contribute to theoretical and practical understandings of the role of communication channels in diffusion of innovations theory. In particular, this study provides a foundation for the use of qualitative research to advance applications of diffusion of innovations theory. Results suggest that participants resisted mass media portrayals of women’s health. When faced with a health question, participants uniformly started with the Internet to “Google it up.” Findings suggest new media comprise a new communication channel with new rules, serving the functions of both personal and impersonal influence. In particular, pregnancy and the postpartum period emerged as a time when campaign planners can access women in new ways online. As a result, campaign planners could benefit from introducing new ideas online and capitalizing on the strength of weak ties favored in new media. Results expand the innovativeness/needs paradox in diffusion of innovations theory by elaborating on the role of new media to reach underserved populations. These findings provide an opportunity to better understand patient information seeking through the lens of diffusion of innovations theory. 相似文献
30.
Tinghu Kang Yang Li Jiandong Guo Xingwen Ma Fatema Akhter Hiramoni Md Zahir Ahmed Mary C. Jobe Oli Ahmed 《International Journal of Mental Health Promotion, The》2022,24(2):207-217
The aim of the study was to explore the relationship between college graduates’ dual self-consciousness, job search
clarity and perceived stress, and reveal the mediating role of perceived stress between dual self-consciousness and
job search clarity. In this study, 467 college graduates were investigated using the Dual Self-Consciousness Scale,
Job Search Clarity Scale, and Perceived Stress Scale. After controlling for gender, age, and region, the results
revealed that: (1) private self-consciousness has a significant positive predictive effect on job search clarity; (2)
perceived stress has a significant negative predictive effect on job search clarity; (3) perceived stress plays partial
mediation effects between private self-consciousness and job search clarity; (4) perceived stress plays complete
mediation effects between public self-consciousness and job search clarity; (5) perceived stress has suppressing
effects between public self-consciousness and job search clarity. 相似文献