全文获取类型
收费全文 | 6015篇 |
免费 | 417篇 |
国内免费 | 19篇 |
专业分类
耳鼻咽喉 | 64篇 |
儿科学 | 206篇 |
妇产科学 | 116篇 |
基础医学 | 802篇 |
口腔科学 | 49篇 |
临床医学 | 961篇 |
内科学 | 1030篇 |
皮肤病学 | 78篇 |
神经病学 | 511篇 |
特种医学 | 131篇 |
外科学 | 654篇 |
综合类 | 42篇 |
一般理论 | 2篇 |
预防医学 | 761篇 |
眼科学 | 64篇 |
药学 | 411篇 |
中国医学 | 2篇 |
肿瘤学 | 567篇 |
出版年
2024年 | 9篇 |
2023年 | 68篇 |
2022年 | 98篇 |
2021年 | 231篇 |
2020年 | 120篇 |
2019年 | 170篇 |
2018年 | 188篇 |
2017年 | 135篇 |
2016年 | 139篇 |
2015年 | 169篇 |
2014年 | 204篇 |
2013年 | 303篇 |
2012年 | 468篇 |
2011年 | 475篇 |
2010年 | 233篇 |
2009年 | 260篇 |
2008年 | 361篇 |
2007年 | 417篇 |
2006年 | 395篇 |
2005年 | 410篇 |
2004年 | 343篇 |
2003年 | 338篇 |
2002年 | 293篇 |
2001年 | 47篇 |
2000年 | 31篇 |
1999年 | 47篇 |
1998年 | 57篇 |
1997年 | 39篇 |
1996年 | 48篇 |
1995年 | 47篇 |
1994年 | 34篇 |
1993年 | 41篇 |
1992年 | 16篇 |
1991年 | 12篇 |
1990年 | 13篇 |
1989年 | 12篇 |
1988年 | 13篇 |
1987年 | 10篇 |
1986年 | 7篇 |
1985年 | 9篇 |
1984年 | 30篇 |
1983年 | 17篇 |
1982年 | 14篇 |
1981年 | 16篇 |
1980年 | 8篇 |
1979年 | 11篇 |
1978年 | 5篇 |
1977年 | 7篇 |
1976年 | 6篇 |
1974年 | 5篇 |
排序方式: 共有6451条查询结果,搜索用时 15 毫秒
111.
112.
113.
Influence of gender,BMI and body shape on theoretical injection outcome at the ventrogluteal and dorsogluteal sites 下载免费PDF全文
Theresa A Larkin PhD MEd Elfriede Ashcroft MEd RN Blake A Hickey MSc Asmahan Elgellaie BSc Hons 《Journal of clinical nursing》2018,27(1-2):e242-e250
Aims and objectives
This study aimed to determine the influences of gender, BMI and observed body shape on subcutaneous fat and muscle thicknesses, and theoretical injection outcome, at the ventrogluteal and dorsogluteal intramuscular injection sites.Background
Debate continues as to whether the dorsogluteal or ventrogluteal injection site is more reliable for a successful intramuscular injection outcome. Subcutaneous fat and muscle thicknesses at the injection site are direct determinants of intramuscular injection outcome. BMI and observed body shape influence gluteal subcutaneous fat and muscle thicknesses, and therefore injection outcome, with potentially distinct effects at the ventrogluteal and dorsogluteal sites.Design
This was a cross‐sectional study.Methods
Demographic data were collected, and subcutaneous fat and muscle thicknesses were quantified bilaterally at the dorsogluteal and ventrogluteal injection sites using ultrasound, for 145 participants (57% female).Results
Subcutaneous fat and muscle were significantly thicker at the dorsogluteal than the ventrogluteal site, and 75% and 86% of participants would receive a successful intramuscular injection at these sites, respectively. There were significant effects of gender, BMI and observed body shape on subcutaneous fat thickness and theoretical injection outcome at both sites. Females, obese individuals and endomorph individuals had thicker subcutaneous fat and were more likely to have a subcutaneous injection outcome.Conclusions
Gender, BMI and observed body shape could be used to guide site and needle length selection when administering gluteal intramuscular injections to increase the likelihood of a successful intramuscular injection outcome.Relevance to clinical practice
Both gluteal injection sites should be avoided in obese individuals and endomorph individuals. An intramuscular injection will be successful: using a 32‐mm needle at the ventrogluteal site for all males and normal‐weight females and using a 38‐mm needle for all females at the ventrogluteal site, and for all males and at least 98% of females at the dorsogluteal site. 相似文献114.
Gabriela Novak Theresa Fan Brian F. O’Dowd Susan R. George 《International journal of developmental neuroscience》2013
The goal of this study was to determine whether two stressors commonly used to model aspects of neuropsychiatric disease in rats have an additive effect on striatal dopamine type 2 receptor (D2R) expression, a key player in the etiology of neuropsychiatric disease. 相似文献
115.
116.
117.
118.
Patterns and challenges of treatment sequencing in patients with hepatocellular carcinoma: Experience from a German referral center 下载免费PDF全文
119.
Alison J. Wright Sophia C. L. Whitwell Chika Takeichi Matthew Hankins Theresa M. Marteau 《British journal of health psychology》2009,14(1):107-125
Objectives. Numeracy, the ability to process basic mathematical concepts, may affect responses to graphical displays of health risk information. Displays of probabilistic risk information using grouped dots are easier to understand than displays using dispersed dots. However, dispersed dots may better convey the randomness with which health threats occur, so increasing perceived susceptibility. We hypothesized that low numeracy participants would better understand risks presented using grouped dot displays, while high numeracy participants would have good understanding, regardless of display type. Moreover, we predicted that dispersed dot displays, in contrast to grouped dot displays, would increase risk perceptions and worry only for highly numerate individuals. Design and method. One hundred and forty smokers read vignettes asking them to imagine being at risk of Crohn's disease, in a 2(display type: dispersed/grouped dots)×3(risk magnitude: 3%/6%/50%)×2(numeracy: high/low) design. They completed measures of risk comprehension, perceived susceptibility and worry. Results. More numerate participants had better objective risk comprehension, but this effect was not moderated by display type. There was marginally significant support for the predicted numeracy × display type interaction for worry about Crohn's disease, but not for perceived susceptibility to the condition. Conclusions. Dispersed dot displays somewhat increase worry in highly numerate individuals, but only numeracy influenced objective risk comprehension. The most effective display type for communicating risk information will depend on the numeracy of the population and the goal(s) of the communication. 相似文献
120.