全文获取类型
收费全文 | 10462篇 |
免费 | 733篇 |
国内免费 | 35篇 |
专业分类
耳鼻咽喉 | 62篇 |
儿科学 | 356篇 |
妇产科学 | 193篇 |
基础医学 | 1237篇 |
口腔科学 | 149篇 |
临床医学 | 993篇 |
内科学 | 2058篇 |
皮肤病学 | 108篇 |
神经病学 | 924篇 |
特种医学 | 367篇 |
外科学 | 1543篇 |
综合类 | 248篇 |
一般理论 | 9篇 |
预防医学 | 1018篇 |
眼科学 | 280篇 |
药学 | 814篇 |
中国医学 | 45篇 |
肿瘤学 | 826篇 |
出版年
2023年 | 41篇 |
2022年 | 34篇 |
2021年 | 182篇 |
2020年 | 135篇 |
2019年 | 219篇 |
2018年 | 230篇 |
2017年 | 168篇 |
2016年 | 194篇 |
2015年 | 214篇 |
2014年 | 361篇 |
2013年 | 464篇 |
2012年 | 757篇 |
2011年 | 793篇 |
2010年 | 408篇 |
2009年 | 402篇 |
2008年 | 666篇 |
2007年 | 798篇 |
2006年 | 741篇 |
2005年 | 730篇 |
2004年 | 668篇 |
2003年 | 630篇 |
2002年 | 571篇 |
2001年 | 86篇 |
2000年 | 70篇 |
1999年 | 80篇 |
1998年 | 103篇 |
1997年 | 105篇 |
1996年 | 67篇 |
1995年 | 82篇 |
1994年 | 72篇 |
1993年 | 83篇 |
1992年 | 64篇 |
1991年 | 37篇 |
1990年 | 39篇 |
1989年 | 43篇 |
1988年 | 42篇 |
1987年 | 38篇 |
1986年 | 38篇 |
1985年 | 46篇 |
1984年 | 54篇 |
1983年 | 39篇 |
1982年 | 54篇 |
1981年 | 51篇 |
1980年 | 48篇 |
1979年 | 23篇 |
1978年 | 29篇 |
1977年 | 21篇 |
1973年 | 30篇 |
1972年 | 21篇 |
1965年 | 20篇 |
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
1.
Deitelzweig Steve Luo Xuemei Nguyen Jennifer L. Malhotra Deepa Emir Birol Russ Cristina Li Xiaoyan Lee Theodore C. Ferri Mauricio Wiederkehr Danny Reimbaeva Maya Barnes Geoffrey D. Piazza Gregory 《Journal of thrombosis and thrombolysis》2022,54(4):696-696
Journal of Thrombosis and Thrombolysis - 相似文献
2.
Schaefer Jordan K. Barnes Geoffrey D. Sussman Jeremy B. Saini Sameer D. Caverly Tanner J. Read Susan Zikmund-Fisher Brian J. Kurlander Jacob E. 《Journal of thrombosis and thrombolysis》2022,54(4):639-646
Journal of Thrombosis and Thrombolysis - Recent trials suggest that aspirin for primary prevention may do more harm than good for some, including adults over 70 years of age. We sought to... 相似文献
3.
Kenya has experienced an increase in the incidence of various types of cancers in the last few decades. This article highlights dietary factors as major contributors to this rising trend of cancer incidence in Kenya at the backdrop of an evolving diet. Literature search revealed that diet plays a major role in the etiology of various cancers with highest incidence rates in various categories of people in Kenya. Other than among children (≤15 years) and HIV/AIDs patients, diet-related cancers such as esophageal, colorectal, stomach, prostate and breast appear to predominate among Kenyans in various categories, i.e., young people (15?≤?30 years), adults (31?≤?65 years), and older people (>65 years). In the past few decades, Kenya has been undergoing nutritional transition characterized by departure from potentially cancer-protective traditional diets (mostly rich in dietary fiber, fruits, and vegetables) to “western diet” (rich in charred red/organ meats, fat, cholesterol, sugar, and salt) that poses elevated cancer risks. Other potentially carcinogenic factors that characterize the evolving Kenyan diet include; drinking of illicit and/or excess alcohol, traditional soot-laced sour milk, reuse of frying fats/oils, kerosene-laced meals, aflatoxin and agrochemical contaminated foods. The various plausible mechanisms of carcinogenesis of these dietary factors are discussed. 相似文献
4.
5.
6.
7.
8.
Shannon Gravely James F. Thrasher K. Michael Cummings Janine Ouimet Ann McNeill Gang Meng Eric N. Lindblom Ruth Loewen Richard J. OConnor Mary E. Thompson Sara C. Hitchman David Hammond Bryan W. Heckman Ron Borland Hua‐Hie Yong Tara Elton‐Marshall Maansi Bansal‐Travers Coral Gartner Geoffrey T. Fong 《Addiction (Abingdon, England)》2019,114(Z1):71-85
9.
Stefanie Hassel Gulshan B. Sharma Gsine L. Alders Andrew D. Davis Stephen R. Arnott Benicio N. Frey Geoffrey B. Hall Jacqueline K. Harris Raymond W. Lam Roumen Milev Daniel J. Müller Susan Rotzinger Mojdeh Zamyadi Sidney H. Kennedy Stephen C. Strother Glenda M. MacQueen 《Human brain mapping》2020,41(6):1400-1415
Task‐based functional neuroimaging methods are increasingly being used to identify biomarkers of treatment response in psychiatric disorders. To facilitate meaningful interpretation of neural correlates of tasks and their potential changes with treatment over time, understanding the reliability of the blood‐oxygen‐level dependent (BOLD) signal of such tasks is essential. We assessed test–retest reliability of an emotional conflict task in healthy participants collected as part of the Canadian Biomarker Integration Network in Depression. Data for 36 participants, scanned at three time points (weeks 0, 2, and 8) were analyzed, and intra‐class correlation coefficients (ICC) were used to quantify reliability. We observed moderate reliability (median ICC values between 0.5 and 0.6), within occipital, parietal, and temporal regions, specifically for conditions of lower cognitive complexity, that is, face, congruent or incongruent trials. For these conditions, activation was also observed within frontal and sub‐cortical regions, however, their reliability was poor (median ICC < 0.2). Clinically relevant prognostic markers based on task‐based fMRI require high predictive accuracy at an individual level. For this to be achieved, reliability of BOLD responses needs to be high. We have shown that reliability of the BOLD response to an emotional conflict task in healthy individuals is moderate. Implications of these findings to further inform studies of treatment effects and biomarker discovery are discussed. 相似文献
10.
Alicia M. Blessing MD PhD Janice M. Santiago-O'Farrill MD PhD Weiqun Mao BS MD Lan Pang BS MD Jing Ning MD PhD Daewoo Pak MD PhD Lakshmi Reddy Bollu MD PhD Philip Rask BS MD LaKesla Iles BS MD Hailing Yang PhD MD Samantha Tran BS MD Ezzeddine Elmir BS MD Geoffrey Bartholomeusz MD PhD Robert Langley MD PhD Zhen Lu MD Robert C. Bast Jr MD 《Cancer》2020,126(15):3579-3592