全文获取类型
收费全文 | 123617篇 |
免费 | 7566篇 |
国内免费 | 1011篇 |
专业分类
耳鼻咽喉 | 1492篇 |
儿科学 | 3404篇 |
妇产科学 | 2751篇 |
基础医学 | 16231篇 |
口腔科学 | 3624篇 |
临床医学 | 10128篇 |
内科学 | 28441篇 |
皮肤病学 | 2324篇 |
神经病学 | 11678篇 |
特种医学 | 4988篇 |
外国民族医学 | 23篇 |
外科学 | 17924篇 |
综合类 | 1744篇 |
一般理论 | 53篇 |
预防医学 | 6672篇 |
眼科学 | 1984篇 |
药学 | 9198篇 |
4篇 | |
中国医学 | 586篇 |
肿瘤学 | 8945篇 |
出版年
2023年 | 702篇 |
2022年 | 1519篇 |
2021年 | 2808篇 |
2020年 | 1758篇 |
2019年 | 2471篇 |
2018年 | 3048篇 |
2017年 | 2362篇 |
2016年 | 2547篇 |
2015年 | 2859篇 |
2014年 | 3727篇 |
2013年 | 5165篇 |
2012年 | 7183篇 |
2011年 | 7300篇 |
2010年 | 4573篇 |
2009年 | 4081篇 |
2008年 | 6247篇 |
2007年 | 6572篇 |
2006年 | 6142篇 |
2005年 | 5785篇 |
2004年 | 5925篇 |
2003年 | 5675篇 |
2002年 | 5532篇 |
2001年 | 3924篇 |
2000年 | 3854篇 |
1999年 | 3173篇 |
1998年 | 1398篇 |
1997年 | 1137篇 |
1996年 | 996篇 |
1995年 | 950篇 |
1994年 | 825篇 |
1993年 | 797篇 |
1992年 | 1878篇 |
1991年 | 1838篇 |
1990年 | 1566篇 |
1989年 | 1502篇 |
1988年 | 1403篇 |
1987年 | 1255篇 |
1986年 | 1216篇 |
1985年 | 1099篇 |
1984年 | 810篇 |
1983年 | 734篇 |
1982年 | 492篇 |
1981年 | 414篇 |
1979年 | 601篇 |
1978年 | 448篇 |
1975年 | 443篇 |
1974年 | 493篇 |
1973年 | 487篇 |
1972年 | 444篇 |
1971年 | 406篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Whereas there is evidence that interpersonal communication, or conversation, influences predictors of alcohol consumption, the role of involvement in conversation effects remains unclear. This study explored how three aspects of involvement (topical relevance, or how relevant the topic of alcohol is; conversational relevance, or how relevant a conversation about alcohol is; and conversational effort, or how much effort people put into such a conversation), influence conversation effects. After assessing topical relevance, 46 same-sex dyads were requested to talk about the negative consequences of heavy drinking. Within each dyad, one participant was asked to take on an active talking role and the other participant a passive listening role. Next, conversational relevance, effort, and predictors of heavy drinking were measured. Results showed that participants who drank more alcohol found the topic of heavy drinking more relevant. This topical relevance increased conversational relevance and conversational effort. Conversational effort further increased when a talking role was assigned. Furthermore, participants who put more effort in the conversation and found it more relevant had more positive norms, identified more strongly with alcohol, and had higher intentions to drink. These findings suggest that more involvement in an alcohol-related conversation does not always lead to desirable outcomes. 相似文献
2.
3.
Wojciech Szychta M.D. Ph.D. Gheorghe Cerin M.D. Ph.D. F.E.S.C. Bogdan Adrian Popa M.D. Armienti Felice M.D. Guido Lanzillo M.D. Ph.D. Marco Diena M.D. Grzegorz Opolski M.D. Ph.D. F.E.S.C. 《Echocardiography (Mount Kisco, N.Y.)》2015,32(6):1040-1043
Sinus venosus atrial septal defect (SV‐ASD) usually coexists with partial anomalous pulmonary vein connection (PAPVC). It is a difficult diagnosis in transthoracic echocardiography (TTE) due to eccentric position of defects. We present a rare case of atypical anatomical variation in PAPVC, which was never described before. Two right pulmonary veins drained into superior vena cava, which overrode SV‐ASD and interatrial septum, a third pulmonary vein into the right atrium. Complete diagnosis could not be set after TTE, nor transesophageal echocardiography, whereas angio‐CT was finally conclusive. This diagnostic approach allowed the surgical planning. 相似文献
4.
Ahmed M. Abu El-Asrar Ajmal Ahmad Eef Allegaert Mohammad Mairaj Siddiquei Priscilla W. Gikandi Gert De Hertogh 《Ocular immunology and inflammation》2020,28(4):575-588
ABSTRACT
Purpose
To investigate the expression of IL-11 and its receptor IL-11Rα and to quantify density of CD163+ M2 macrophages in proliferative diabetic retinopathy (PDR). 相似文献5.
Borrelli Enrico Grosso Domenico Vella Giovanna Sacconi Riccardo Battista Marco Querques Lea Zucchiatti Ilaria Prascina Francesco Bandello Francesco Querques Giuseppe 《Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie》2020,258(12):2621-2628
Graefe's Archive for Clinical and Experimental Ophthalmology - To estimate the impact of delayed care during the coronavirus disease 2019 (COVID-19) pandemic on the outcomes of patients with... 相似文献
6.
7.
8.
9.
10.