全文获取类型
收费全文 | 1348195篇 |
免费 | 101460篇 |
国内免费 | 4292篇 |
专业分类
耳鼻咽喉 | 16899篇 |
儿科学 | 44091篇 |
妇产科学 | 36746篇 |
基础医学 | 199505篇 |
口腔科学 | 36071篇 |
临床医学 | 131857篇 |
内科学 | 260322篇 |
皮肤病学 | 26512篇 |
神经病学 | 112945篇 |
特种医学 | 48399篇 |
外国民族医学 | 367篇 |
外科学 | 184989篇 |
综合类 | 29320篇 |
现状与发展 | 1篇 |
一般理论 | 494篇 |
预防医学 | 116409篇 |
眼科学 | 29190篇 |
药学 | 99524篇 |
6篇 | |
中国医学 | 3173篇 |
肿瘤学 | 77127篇 |
出版年
2021年 | 11157篇 |
2019年 | 11886篇 |
2018年 | 16576篇 |
2017年 | 12490篇 |
2016年 | 13490篇 |
2015年 | 15485篇 |
2014年 | 21176篇 |
2013年 | 32695篇 |
2012年 | 45177篇 |
2011年 | 47840篇 |
2010年 | 27524篇 |
2009年 | 25365篇 |
2008年 | 43529篇 |
2007年 | 45988篇 |
2006年 | 46081篇 |
2005年 | 44515篇 |
2004年 | 42479篇 |
2003年 | 40375篇 |
2002年 | 39118篇 |
2001年 | 60973篇 |
2000年 | 62602篇 |
1999年 | 52418篇 |
1998年 | 14754篇 |
1997年 | 13425篇 |
1996年 | 13268篇 |
1995年 | 12601篇 |
1994年 | 11730篇 |
1993年 | 11011篇 |
1992年 | 41642篇 |
1991年 | 40823篇 |
1990年 | 39520篇 |
1989年 | 37408篇 |
1988年 | 34645篇 |
1987年 | 33739篇 |
1986年 | 32208篇 |
1985年 | 30690篇 |
1984年 | 23093篇 |
1983年 | 19648篇 |
1982年 | 11810篇 |
1979年 | 20858篇 |
1978年 | 14857篇 |
1977年 | 12106篇 |
1976年 | 11920篇 |
1975年 | 12133篇 |
1974年 | 14837篇 |
1973年 | 14492篇 |
1972年 | 13378篇 |
1971年 | 12436篇 |
1970年 | 11499篇 |
1969年 | 10419篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
61.
62.
Annals of Nuclear Medicine - The Response Evaluation Criteria In Solid Tumors (RECIST) is the most used radiological method for evaluating response after peptide receptor radionuclide therapy... 相似文献
63.
64.
65.
Jamaal L. Benjamin MD PhD Rebecca Dennis DO Stacy White Jr MD David Munson MD Sudha A. Anupindi MD Maciej Piskunowicz MD Kassa Darge MD PhD Ami Gokli MD Misun Hwang MD 《Journal of ultrasound in medicine》2020,39(5):1031-1036
Bowel diseases of prematurity, including necrotizing enterocolitis, are dreaded ailments of neonates. Early diagnosis is difficult, with clinical and radiographic findings often inconclusive. We present a novel use of contrast-enhanced ultrasound in detection of pediatric bowel disease. Early identification of compromised blood flow or an at-risk bowel can be quantitatively detected and monitored. This ability has implications for guidance of emerging therapies, allowing targeting of inflammation. These findings represent an advancement in detection of bowel disease in neonates. 相似文献
66.
Christian Holm Hansen Shelley Lees Saidi Kapiga Janet Seeley Tony Barnett 《Global public health》2020,15(3):402-413
ABSTRACTMeasuring hope reliably and accurately remains an important research objective, not least in less prosperous settings where ‘holding on to hope’ may be critically important in the struggle against adverse life conditions. The State Hope Scale was designed for use in the US. Despite reported application in diverse cultures and using translations the scale has not been extensively validated outside US populations. This study contributes to a larger project exploring the measurement of hope and provides a critique of Snyder’s scale as used in a Tanzanian female population of 1021 urban microfinance participants. We evaluate the scale’s validity through assessment of the empirical distribution of scores, item response profiles, internal consistency and discriminatory ability. Participants mostly scored very high and many reached very near the maximum attainable score. Hardly any endorsed the negative half of the response scale. Several problems are discussed including poor discrimination and strong evidence of acquiescence response bias. We also found little association of the scale scores with hypothesised correlates of hope. Future improvements on the measurement of hope are recommended, especially in studies outside the narrow Western context in which the scale was devised. 相似文献
67.
T. Wu L. G. Trahair M. J. Bound C. F. Deacon M. Horowitz C. K. Rayner K. L. Jones 《Diabetic medicine》2015,32(5):595-600
68.
In 1963, Goffman argued that forming a group based on shared stigma may provide benefits. However, there is no empirical research on whether perception that a separate, unique, coherent group exists (i.e., group entitativity) influences coping, such as educating others or secrecy, for the stigmatized individual or his or her spouse. Further, little is known about how spouses influence each other in terms of promoting the education of others about a stigmatizing condition, especially when it comes to the role of believing that stigma-based groups, to which they may both belong, exist. This study provides a step toward bridging this gap in the research by applying the label management model in efforts to understand coping for couples in which one spouse is diagnosed with genetic mutations leading to alpha-1 antitrypsin deficiency (AATD). This study included 50 married couples in which one spouse is diagnosed with genetic mutations leading to alpha-1 antitrypsin deficiency (AATD). We found that group entitativity related to those with AATD counterbalanced the influence of genetic stigma on spouses’ intentions to keep the diagnosis secret or to educate others about it. Intrapersonal and interpersonal influences appeared among spouses. Attention is needed on the power of creating groups for stigmatized persons and their relatives. Indeed, people live within a dynamic world of group entities, and multiple social identities including spousal and familial. While attention has been paid to the diffusion of stigmas to loved ones, less has been paid to the uplift of group entities for them. 相似文献
69.
Feasibility and Diagnostic Potential of Pulmonary Transit Time Measurement by Contrast Echocardiography: A Pilot Study
下载免费PDF全文
![点击此处可从《Echocardiography (Mount Kisco, N.Y.)》网站下载免费的PDF全文](/ch/ext_images/free.gif)
70.
ABSTRACTThis work collates data from the analysis of complex mixtures analysed in STRmix during routine no-suspect volume crime work. It interrogates the upload rate for these types of mixtures and which component of the profile has been able to be interpreted for upload. The number of profiles giving multiple uploads and the amount of replicate PCR analysis has been collated. 相似文献