全文获取类型
收费全文 | 201017篇 |
免费 | 3081篇 |
国内免费 | 83篇 |
专业分类
耳鼻咽喉 | 1329篇 |
儿科学 | 7264篇 |
妇产科学 | 3599篇 |
基础医学 | 20244篇 |
口腔科学 | 1882篇 |
临床医学 | 15012篇 |
内科学 | 35871篇 |
皮肤病学 | 959篇 |
神经病学 | 18789篇 |
特种医学 | 9468篇 |
外国民族医学 | 3篇 |
外科学 | 32316篇 |
综合类 | 2841篇 |
一般理论 | 42篇 |
预防医学 | 20412篇 |
眼科学 | 3595篇 |
药学 | 11624篇 |
中国医学 | 660篇 |
肿瘤学 | 18271篇 |
出版年
2023年 | 188篇 |
2022年 | 266篇 |
2021年 | 612篇 |
2020年 | 386篇 |
2019年 | 628篇 |
2018年 | 22427篇 |
2017年 | 17760篇 |
2016年 | 19993篇 |
2015年 | 1550篇 |
2014年 | 1719篇 |
2013年 | 2122篇 |
2012年 | 8816篇 |
2011年 | 22904篇 |
2010年 | 19841篇 |
2009年 | 12456篇 |
2008年 | 21051篇 |
2007年 | 23360篇 |
2006年 | 2352篇 |
2005年 | 3965篇 |
2004年 | 5129篇 |
2003年 | 5846篇 |
2002年 | 3897篇 |
2001年 | 479篇 |
2000年 | 576篇 |
1999年 | 400篇 |
1998年 | 529篇 |
1997年 | 482篇 |
1996年 | 352篇 |
1995年 | 348篇 |
1994年 | 294篇 |
1993年 | 265篇 |
1992年 | 185篇 |
1991年 | 207篇 |
1990年 | 227篇 |
1989年 | 171篇 |
1988年 | 156篇 |
1987年 | 130篇 |
1986年 | 104篇 |
1985年 | 119篇 |
1984年 | 118篇 |
1983年 | 122篇 |
1982年 | 156篇 |
1981年 | 124篇 |
1980年 | 134篇 |
1978年 | 68篇 |
1977年 | 67篇 |
1976年 | 66篇 |
1974年 | 74篇 |
1938年 | 61篇 |
1932年 | 59篇 |
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
11.
Valerie Iles 《Health care analysis》2016,24(2):105-118
This paper takes a somewhat slant perspective on flourishing and care in the context of suffering, death and dying, arguing that care in this context consists principally of ‘acts of work and courage that enable flourishing’. Starting with the perception that individuals, society and health care professionals have become dulled to death and the process of dying in Western advanced health systems, it suggests that for flourishing to occur, both of these aspects of life need to be faced more directly. The last days of life need to be ‘undulled’. Reflections upon the experiences of the author as carer and daughter in the face of her mother’s experience of death are used as basis for making suggestions about how care systems and professionals might better assist people in dealing with ‘the most grown up thing’ humans ever do, which is to die. 相似文献
12.
13.
14.
Ian M. Windmill 《中国听力语言康复科学杂志》2015,(1)
随着婴儿潮、人口老龄化及新技术的广泛应用,人们对听力保健的需求显著增加。在美国,听力保健服务由助听设备专员、耳鼻喉科医生和听力师3类人员提供,其中听力师提供除医疗、手术外宽泛的听力保健服务。美国的听力保健服务体系及听力师教育体系经历了一个渐进的过程:20年前对从业人员的学历要求是听力学硕士,随着对服务质量要求的提高和服务范围的扩大,美国听力师逐渐要求专业博士学位(Au.D),毕业后还需3~4年的专门教育才能成为一名听力师。听力师教育有统一的标准,大学课程要通过听力教育认证委员会(the Accreditation Commission for Audiology Education, ACAE)或学术认证委员会(the Council on Academic Accreditation,CAA)的多程序严格的认证才能被承认。美国听力师需求存在巨大缺口,但是各国听力学教育标准不统一及听力师收入与教育投资不匹配,阻碍了更多的人进入这一领域。美国试图通过改变教育模式,降低教育成本及革新教学方法等改善听力师教育状况,但是听力师教育体系远未完善。 相似文献
15.
Henry Havel Gregory Finch Pamela Strode Marc Wolfgang Stephen Zale Iulian Bobe Hagop Youssoufian Matthew Peterson Maggie Liu 《The AAPS journal》2016,18(6):1373-1378
Advancing nanomedicines from concept to clinic requires integration of new science with traditional pharmaceutical development. The medical and commercial success of nanomedicines is greatly facilitated when those charged with developing nanomedicines are cognizant of the unique opportunities and technical challenges that these products present. These individuals must also be knowledgeable about the processes of clinical and product development, including regulatory considerations, to maximize the odds for successful product registration. This article outlines these topics with a goal to accelerate the combination of academic innovation with collaborative industrial scientists who understand pharmaceutical development and regulatory approval requirements—only together can they realize the full potential of nanomedicines for patients. 相似文献
16.
17.
M. Alexandra Friedman Charlotte M. Niznik Janelle R. Bolden Lynn M. Yee 《Journal of community health》2016,41(2):354-358
While peer support has been investigated in multiple clinical contexts, its application to the postpartum setting is unknown. The aim was to assess acceptability of a postpartum peer support program for women with diabetes. Observational survey-based needs assessment of forty low-income women with diabetes, receiving care at a major medical institution. Mean age and gravidity were 30.7 years and 3.15 ± 1.67 respectively. 45 % expressed interest in a “buddy.” There was no significant difference between groups desiring and not desiring this program. A majority of respondents desired telephone, text messaging, and in-person contacts (79.2, 72.1, 83.8 %), with 72.5 % of patients desiring diabetes-related activities during clinic waiting time. Many women desire a postpartum diabetes reciprocal peer program for support outside of clinician visits. Patients are receptive to educational services during their wait and outside of clinic time, a potentially valuable opportunity to share important health information. 相似文献
18.
Michael W. Manning Yi-Ju Li Dean Linder John C. Haney Yi-Hung Wu Mihai V. Podgoreanu Madhav Swaminathan Jacob N. Schroder Carmelo A. Milano Ian J. Welsby Mark Stafford-Smith Kamrouz Ghadimi 《Journal of cardiothoracic and vascular anesthesia》2021,35(5):1310-1318
- Download : Download high-res image (215KB)
- Download : Download full-size image
19.
20.
Konrad Matyja Anna Małachowska-Jutsz Anna K. Mazur Kazimierz Grabas 《Ecotoxicology (London, England)》2016,25(5):924-939
Dehydrogenase activity is frequently used to assess the general condition of microorganisms in soil and activated sludge. Many studies have investigated the inhibition of dehydrogenase activity by various compounds, including heavy metal ions. However, the time after which the measurements are carried out is often chosen arbitrarily. Thus, it can be difficult to estimate how the toxic effects of compounds vary during the reaction and when the maximum of the effect would be reached. Hence, the aim of this study was to create simple and useful mathematical model describing changes in dehydrogenase activity during exposure to substances that inactivate enzymes. Our model is based on the Lagergrens pseudo-first-order equation, the rate of chemical reactions, enzyme activity, and inactivation and was created to describe short-term changes in dehydrogenase activity. The main assumption of our model is that toxic substances cause irreversible inactivation of enzyme units. The model is able to predict the maximum direct toxic effect (MDTE) and the time to reach this maximum (TMDTE). In order to validate our model, we present two examples: inactivation of dehydrogenase in microorganisms in soil and activated sludge. The model was applied successfully for cadmium and copper ions. Our results indicate that the predicted MDTE and TMDTE are more appropriate than EC50 and IC50 for toxicity assessments, except for long exposure times. 相似文献