首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   39699篇
  免费   2982篇
  国内免费   519篇
耳鼻咽喉   310篇
儿科学   2105篇
妇产科学   810篇
基础医学   6296篇
口腔科学   799篇
临床医学   4011篇
内科学   2754篇
皮肤病学   146篇
神经病学   7093篇
特种医学   611篇
外科学   1285篇
综合类   3830篇
现状与发展   5篇
一般理论   7篇
预防医学   7816篇
眼科学   461篇
药学   3278篇
  24篇
中国医学   1028篇
肿瘤学   531篇
  2024年   40篇
  2023年   630篇
  2022年   967篇
  2021年   1542篇
  2020年   1568篇
  2019年   1515篇
  2018年   1294篇
  2017年   1372篇
  2016年   1465篇
  2015年   1337篇
  2014年   2425篇
  2013年   3399篇
  2012年   2222篇
  2011年   2467篇
  2010年   2063篇
  2009年   2089篇
  2008年   2059篇
  2007年   1985篇
  2006年   1593篇
  2005年   1312篇
  2004年   1169篇
  2003年   957篇
  2002年   781篇
  2001年   689篇
  2000年   609篇
  1999年   513篇
  1998年   420篇
  1997年   347篇
  1996年   325篇
  1995年   402篇
  1994年   341篇
  1993年   295篇
  1992年   282篇
  1991年   241篇
  1990年   243篇
  1989年   182篇
  1988年   180篇
  1987年   150篇
  1986年   186篇
  1985年   248篇
  1984年   230篇
  1983年   140篇
  1982年   125篇
  1981年   158篇
  1980年   143篇
  1979年   104篇
  1978年   90篇
  1977年   54篇
  1976年   61篇
  1974年   39篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
11.
《Cirugía espa?ola》2022,100(3):149-153
IntroductionThe Law for the Regulation of Health Professions (LOPS) indicates that health professionals will carry out continuous training throughout their professional life, and will regularly prove their professional competence. The objective of the study was to carry out a national survey to find out the opinion of Spanish surgeons and thus be able to prepare a recertification project by the Spanish Association of Surgeons (AEC).MethodsCross-sectional observational study carried out in June-July 2020, through a survey sent to the members of the AEC.ResultsThe survey had a total of 1230 visits and an overall completion rate of 784 responses (67.3%). 69.6% were unaware of the LOPS forecasts and 83.4% were unaware of similar initiatives in other specialties and 95.5% agreed to demand adequate information. 71.4% believed it necessary but only 57% believed that it should be mandatory. 82.9% would agree that it should be regulated through an objective and predictable official procedure.ConclusionsThe concept of re-accreditation is not well known in our specialty and in view of the results obtained, adequate and reliable information seems necessary. Therefore, it would be pertinent to propose by the AEC a specific project to assess activities and skills.  相似文献   
12.
Whose values matter when considering which environment is healthier for a child whose guardianship is contested? The biological mother from a remote Australian Aboriginal community, who voluntarily relinquished her but has now requested her return? The foster mother who has cared for her in a metropolitan centre in another State of Australia, thousands of kilometres away? The welfare professionals who also live in that city? Or the child herself, who left her birth home and community five years earlier at the age of two? Drawing on a case study of a seven-year old Aboriginal girl, the authors argue that non-Indigenous values trumped Indigenous values without the realisation of key players who were empowered to make such determinations. The article uses Manuel DeLanda's neo-assemblage theory to consider the range of processes that exert themselves to shape place-values and social identity in colonised nations. It will also draw on Erik Erikson's and Lev Vygotsky's theories of psychosocial development to consider competing sets of values that raised feelings of dissonance within the child. Beliefs about what makes a place health-giving are revealed to be complex in colonised nations. Despite policy and legislative changes to better support Aboriginal people and their right to difference, non-Indigenous professionals can continue to be driven by an unrecognised systemic racism. While place-values are not, of course, the only (or perhaps even the most significant) consideration in guardianship determinations, this article will argue they can play a significant and covert role.  相似文献   
13.
PurposeAccording to the social determinants of health framework, income inequality is a potential risk factor for adverse mental health. However, few studies have explored the mechanisms suspected to mediate this relationship. The current study addresses this gap through a mediation analysis to determine if social support and community engagement act as mediators linking neighbourhood income inequality to maternal anxiety and depressive symptoms within a cohort of new mothers living in the City of Calgary, Canada.MethodsData collected at three years postpartum from mothers belonging to the All Our Families (AOF) cohort were used in the current study. Maternal data were collected between 2012 and 2015 and linked to neighbourhood socioeconomic data from the 2006 Canadian Census. Income inequality was measured using Gini coefficients derived from 2006 after-tax census data. Generalized structural equation models were used to quantify the associations between income inequality and mental health symptoms, and to assess the potential direct and indirect mediating effects of maternal social support and community engagement.ResultsIncome inequality was not significantly associated with higher depressive symptoms (β = 0.32, 95%CI = −0.067, 0.70), anxiety symptoms (β = 0.11, 95%CI = −0.39, 0.60), or lower social support. Income inequality was not associated with community engagement. For the depression models, higher social support was significantly associated with lower depressive symptoms (β = −0.13, 95%CI = −0.15, −0.097), while community engagement was not significantly associated with depressive symptoms (β = 0.059, 95%CI = −0.15, 0.27). Similarly, for the anxiety models, lower anxiety symptoms were significantly associated with higher levels of social support (β = −0.17, 95%CI = −0.20, −0.13) but not with higher levels of community engagement (β = 0.14, 95%CI = −0.14, 0.41).ConclusionThe current study did not find clear evidence for social support or community engagement mediating the relationship between neighbourhood income inequality and maternal mental health. Future investigations should employ a broader longitudinal approach to capture changes in income inequality, potential mediators, and mental health symptomatology over time.  相似文献   
14.
目的探讨妊娠晚期孕妇抑郁情绪对新生儿神经行为发育的影响。方法选取2017年1月—2018年12月,收治本院的160例妊娠晚期孕妇抑郁情绪患者一般临床资料,妊娠周期28周以上,对孕妇抑郁情绪进行统计采用爱丁堡抑郁自评量表、负性认知加工偏向量表,对新生儿神经行为进行评估时按照婴儿神经国际量表。结果160例妊娠晚期孕妇抑郁情绪患者中,阳性30例、阴性130例,与阴性妊娠妇女相比,抑郁阳性妊娠妇女负性沉思偏向、负性解释偏向、负性记忆偏向、负性注意偏向均显著较高,差异具有统计学意义(P<0.05)。160例新生儿中,婴儿神经国际量表评分处于临界值为60例,正常值为100例,神经行为异常发生率为37.50%,负性沉思偏向、负性注意偏向与婴儿神经国际临界值呈负相关关系(P<0.05);与抑郁自评量表无明显相关性(P>0.05)。结论妊娠晚期孕妇具有较高抑郁发生率,其中负性认知加工偏向中负性沉思偏向、负性注意偏向与新生儿神经行为发育具有明显相关性。  相似文献   
15.
The specificity with which past experiences can be remembered varies across the lifespan, possibly due to differences in how precisely information is encoded. Memory formation can be investigated through repetition effects, the common finding that neural activity is altered when stimuli are repeated. However, whether differences in this indirect measure of memory formation relate to lifespan differences in memory specificity has not yet been established. In the present study, we examined repetition effects in event-related potentials and their relation to recognition. During incidental encoding, children (aged 7–9 years), young adults (18–30 years), and older adults (65–76 years) viewed repeated object images from different categories. During subsequent recognition, we distinguished memory for the specific items versus the general categories. We identified repetition suppression in all age groups, and repetition enhancement for adults. Furthermore, individual item recognition performance comprising lure discrimination was positively associated with the magnitude of the neural repetition effects, which did not differ between groups, indicating common neural mechanisms of memory formation. Our findings demonstrate that neural repetition effects reflect the formation of highly specific memory representations and highlight their significance as a neural indicator of individual differences in episodic memory encoding across the lifespan.  相似文献   
16.
17.
结核病与糖尿病均是临床上的常见病和多发病,两者可合并存在,相互影响。活动性结核病作为感染因素可加重糖尿病病情,而糖尿病患者又是发生结核病的高危人群,结核病与糖尿病双重负担将成为重大的全球公共卫生问题。因此,需重视结核病与糖尿病共病的治疗管理。本共识重点介绍了结核病与糖尿病共病的危害、发病机制、双向筛查、临床特点、诊断、治疗和管理等内容。  相似文献   
18.
The adoption of a management approach that integrates corporate social responsibility in organizations is an increasing trend that responds to the demands of society related to sustainability, ethics and transparency. Health organizations are adopting corporate social responsibility asymmetrically, which raises the analysis of the implementation models and the developed initiatives. Through qualitative research, with four in-depth case studies of the Catalan health sector, this article analyzes the need to address this new approach and to identify good practices and the challenges for its implementation.  相似文献   
19.
ObjectiveTo describe how the community from El Faro neighborhood identifies its community assets, uses them to face life's challenges through the capacity of collective agency; and by generating community development processes, applying the salutogenic theory that considers people as active subjects, with the capacity to conserve and generate health and well-being, through the use of their own resources called health assets.MethodsA map of community assets was made in 2018 in el Faro neighborhood, an informal settlement of Medellín, Colombia, following the phases recommended by other authors and from a qualitative, participatory approach that delves into the health situation of the community.ResultsIn this process were identified 12 individual community assets, 12 collective, 13 institutional and 10 in the environment. The main community asset among the 47 described was community participation, from the agency capacity, mainly of its leaders who participating in their own organizations encourage development, identity construction and well-being.ConclusionAsset mapping has served to identify intangible assets for the community and, in turn, this recognition has been useful in strengthening the agency's capacity for community development. This is a territory transformed by community reflection processes allowing to understand situations of exclusion and poverty, seeking to create a more livable place and developing a community capacity to solve their own problems, through solidarity and community support.  相似文献   
20.
Diffusion magnetic resonance imaging (dMRI) provides indirect measures of white matter microstructure that can be used to make inferences about structural connectivity within the brain. Over the last decade, a growing literature of cross-sectional and longitudinal studies have documented relationships between dMRI indices and cognitive development. In this review, we provide a brief overview of dMRI methods and how they can be used to study white matter and connectivity and review the extant literature examining the links between dMRI indices and executive functions during development. We explore the links between white matter microstructure and specific executive functions: inhibition, working memory and cognitive shifting, as well as performance on complex executive function tasks. Concordance in findings across studies are highlighted, and potential explanations for discrepancies between results, together with challenges with using dMRI in child and adolescent populations, are discussed. Finally, we explore future directions that are necessary to better understand the links between child and adolescent development of structural connectivity of the brain and executive functions.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号