全文获取类型
收费全文 | 3514篇 |
免费 | 194篇 |
国内免费 | 8篇 |
专业分类
耳鼻咽喉 | 28篇 |
儿科学 | 100篇 |
妇产科学 | 91篇 |
基础医学 | 394篇 |
口腔科学 | 49篇 |
临床医学 | 465篇 |
内科学 | 500篇 |
皮肤病学 | 72篇 |
神经病学 | 386篇 |
特种医学 | 84篇 |
外科学 | 409篇 |
综合类 | 24篇 |
一般理论 | 1篇 |
预防医学 | 578篇 |
眼科学 | 29篇 |
药学 | 197篇 |
中国医学 | 6篇 |
肿瘤学 | 303篇 |
出版年
2024年 | 5篇 |
2023年 | 37篇 |
2022年 | 64篇 |
2021年 | 108篇 |
2020年 | 65篇 |
2019年 | 90篇 |
2018年 | 107篇 |
2017年 | 84篇 |
2016年 | 109篇 |
2015年 | 89篇 |
2014年 | 115篇 |
2013年 | 199篇 |
2012年 | 260篇 |
2011年 | 310篇 |
2010年 | 135篇 |
2009年 | 130篇 |
2008年 | 224篇 |
2007年 | 265篇 |
2006年 | 222篇 |
2005年 | 243篇 |
2004年 | 233篇 |
2003年 | 223篇 |
2002年 | 209篇 |
2001年 | 31篇 |
2000年 | 18篇 |
1999年 | 11篇 |
1998年 | 27篇 |
1997年 | 21篇 |
1996年 | 10篇 |
1995年 | 7篇 |
1994年 | 7篇 |
1993年 | 12篇 |
1992年 | 8篇 |
1991年 | 7篇 |
1990年 | 2篇 |
1989年 | 4篇 |
1987年 | 3篇 |
1986年 | 2篇 |
1985年 | 4篇 |
1983年 | 2篇 |
1982年 | 3篇 |
1981年 | 2篇 |
1980年 | 3篇 |
1979年 | 2篇 |
1976年 | 1篇 |
1973年 | 1篇 |
1969年 | 1篇 |
1966年 | 1篇 |
排序方式: 共有3716条查询结果,搜索用时 718 毫秒
81.
82.
83.
Due to the recent rapid expansion in our understanding of the composition of the gut microflora and the consequences of altering that composition the question of how bacteria colonise mucus layers and interact with components of mucus, such as mucin, is now receiving widespread attention. Using a combination of mucus secreting cells, and a novel mucin microarray platform containing purified native mucins from different sources we recently demonstrated that two gastrointestinal pathogens, Helicobacter pylori and Campylobacter jejuni, colonise mucus by different mechanisms. This result emphasizes the potential for even closely related bacteria to interact with mucus in divergent ways to establish successful infection. Expanding the use of the mucin arrays described in the study to other microorganisms, both pathogenic and commensal, should lead to the discovery of biologically important motifs in bacterial-host interactions and complement the use of novel in vitro cell models, such as mucus secreting cell lines. 相似文献
84.
85.
86.
Ropero-Álvarez AM Kurtis HJ Danovaro-Holliday MC Ruiz-Matus C Tambini G 《The Journal of infectious diseases》2012,205(Z1):S120-S125
Vaccination Week in the Americas (VWA) is an initiative of the countries and territories of the Americas that works to advance equity and access to vaccination. The initiative focuses on reaching populations with limited access to regular health services and promotes solidarity among countries. As the Expanded Program on Immunization is one of the world's best-established health programs, integrating other interventions with immunization services has been highly promoted. Using data available from the Pan American Health Organization, we explored the extent of integration of other interventions with immunization in Latin American and Caribbean (LAC) countries as part of VWA. At least 14 countries or territories have integrated other interventions with immunization during VWA. The most common integrated intervention is vitamin A supplementation, followed by deworming. However, a variety of other interventions have been integrated, such as educational activities, supplementation with vitamins and minerals, and provision of health services. Data on coverage of integrated interventions are limited. Integration of other interventions with immunization in LAC countries is widespread, and its impact and lessons learned merit further examination. 相似文献
87.
We analyse nine low-income and lower-middle-income countries in Africa and Asia that have implemented national health insurance reforms designed to move towards universal health coverage. Using the functions-of-health-systems framework, we describe these countries' approaches to raising prepaid revenues, pooling risk, and purchasing services. Then, using the coverage-box framework, we assess their progress across three dimensions of coverage: who, what services, and what proportion of health costs are covered. We identify some patterns in the structure of these countries' reforms, such as use of tax revenues to subsidise target populations, steps towards broader risk pools, and emphasis on purchasing services through demand-side financing mechanisms. However, none of the reforms purely conform to common health-system archetypes, nor are they identical to each other. We report some trends in these countries' progress towards universal coverage, such as increasing enrolment in government health insurance, a movement towards expanded benefits packages, and decreasing out-of-pocket spending accompanied by increasing government share of spending on health. Common, comparable indicators of progress towards universal coverage are needed to enable countries undergoing reforms to assess outcomes and make midcourse corrections in policy and implementation. 相似文献
88.
89.
To date, most investigations of false confessions have focused on their prevention rather than their identification. In this study we investigated whether certain linguistic variables might help to distinguish between false confessional statements and true accounts. Using a within-subjects design, we elicited both false confessional statements and true accounts from 85 participants. We examined these for the presence of nouns, verbs and adjectives. Additionally, participants completed the Depression, Anxiety and Stress Scale (DASS) to determine the relationship between noun, verb and adjective use and self-reported measures of state anxiety. Results showed that whereas nouns and verbs failed to discriminate between false confessions and true accounts, adjective use significantly decreased during false confessions. Anxiety was not associated with veracity. The current findings suggest that there are measurable linguistic differences between false confessions and true accounts that cannot be attributed to level of state anxiety. 相似文献
90.
Magical ideation has repeatedly been shown to be related to handedness, with mixed-handers exhibiting higher levels of magical thinking. However, most previous research has assessed hand preference with a questionnaire measure, leaving open the possibility that the correlation reflects some aspect of questionnaire-taking behaviour and not an underlying neuropsychological relationship. The present study addressed this issue by administering the Magical Ideation Scale (Eckblad & Chapman, 1983), the Waterloo Handedness Questionnaire-Revised (Elias, Bryden, & Bulman-Fleming, 1998), and a manual dot-filling task (Tapley & Bryden, 1985) as a behavioural measure of handedness to an undergraduate student sample. The expected relationship between magical ideation and handedness as assessed by the questionnaire was observed. However, magical ideation was not related to the behavioural measure of handedness. Results cast doubt on a neuropsychological interpretation of the relationship between handedness and magical ideation in sub-clinical populations. 相似文献