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   9365篇
  免费   323篇
  国内免费   61篇
管理学   122篇
民族学   189篇
人才学   2篇
人口学   142篇
丛书文集   1366篇
理论方法论   472篇
综合类   6768篇
社会学   510篇
统计学   178篇
  2024年   11篇
  2023年   28篇
  2022年   42篇
  2021年   57篇
  2020年   74篇
  2019年   92篇
  2018年   101篇
  2017年   126篇
  2016年   136篇
  2015年   165篇
  2014年   355篇
  2013年   395篇
  2012年   500篇
  2011年   594篇
  2010年   564篇
  2009年   672篇
  2008年   773篇
  2007年   1204篇
  2006年   1090篇
  2005年   824篇
  2004年   547篇
  2003年   592篇
  2002年   265篇
  2001年   231篇
  2000年   153篇
  1999年   33篇
  1998年   27篇
  1997年   16篇
  1996年   17篇
  1995年   11篇
  1994年   15篇
  1993年   8篇
  1992年   7篇
  1991年   6篇
  1990年   4篇
  1989年   5篇
  1988年   2篇
  1987年   3篇
  1982年   2篇
  1981年   1篇
  1975年   1篇
排序方式: 共有9749条查询结果,搜索用时 15 毫秒
1.

Aim

To assess the relationship between the duration of the second stage of labour and postpartum anaemia during vaginal birth.

Methods

An observational, analytical retrospective cohort study was performed at the “Mancha-Centro Hospital” (Spain) during the 2013–2016 period. Data were collected from 3437 women who had a vaginal birth. Postpartum anaemia was defined as a haemoglobin level below 11 g/dL at 24 h postpartum. A univariate analysis was used for potential risk factors and a multivariate analysis with binary logistic regression to control for possible confounding factors.

Findings

The incidence of postpartum anaemia was 42.0%. The risk of postpartum anaemia did not increase in nulliparous women whose duration of the second stage of labour exceeded 4 h. Compared with multiparous women who delivered between 0 and 3 h, multiparous women with a duration of the second stage of labour beyond 3 h were at higher risk of postpartum anaemia (OR = 2.43 [1.30–4.52]).

Conclusion

The duration of the second stage of labour beyond 4 h is safe for postpartum anaemia in nulliparous women. However in multiparous women, monitoring should increase if the second stage of labour exceeds 3 h given the increased risk of postpartum anaemia.  相似文献   
2.
This article highlights three dimensions to understanding children's well‐being during and after parental imprisonment which have not been fully explored in current research. A consideration of ‘time’ reveals the importance of children's past experiences and their anticipated futures. A focus on ‘space’ highlights the impact of new or altered environmental dynamics. A study of ‘agency’ illuminates how children cope within structural, material and social confines which intensify vulnerability and dependency. This integrated perspective reveals important differences in individual children's experiences and commonalities in broader systemic and social constraints on prisoners’ children. The paper analyses data from a prospective longitudinal study of 35 prisoners’ children during and after their (step) father's imprisonment to illustrate the arguments.  相似文献   
3.
作为马克思主义哲学研究的社会发展,不是对具体的社会发展问题进行实证研究,而主要是运用逻辑手段,对复杂的社会发展现象进行抽象、概括,揭示出社会整体发展的普遍本质和一般规律。为了对社会发展有一个较为全面的理解,从社会、社会革命、社会变迁、社会转型与社会发展之间的关系入手进行了探讨。  相似文献   
4.
张士引 《北方论丛》2015,(5):141-147
贫困表现为人的基本需要得不到满足,“富裕社会”中的贫困表现为私人生产、物质生产的过剩和公共生产、精神生产的不足。加尔布雷思认为,美国“富裕社会”中贫困的原因是不平衡的“二元经济体系”,只要实行“新社会主义”,实现“计划体系”和“市场体系”的平衡,就能解决“富裕”背后的贫困问题。由于这一设想是以不改变资本主义的经济基础为前提的,所以,只能是一种治标不治本的改良。只有扬弃经济学的“传统智慧”,建构以促进“每个人的自由发展”为目标的“全面生产”经济学,才能从根本上消除“富裕社会”中的贫困问题。  相似文献   
5.
农村互助型社会养老是具有中国特色的社会养老的发展形式,是对农村传统家庭养老的重要补充。它扎根于农村传统的亲邻互助网络,其本质在于经济互助,表现为有组织地发动邻里、志愿等社会力量,充分利用以老年人为主的各类人力资源的闲置时间、资源低成本地相互帮助和服务。社会各界应将其作为重要实施方略,纳入积极应对人口老龄化战略和乡村振兴战略之中。其发展路径可以概括为:以资金互助为基础,以组织动员为抓手,以服务互助为重点,以社区居家养老为主要阵地,创新各类互助养老模式,着力形成稳定多元的资金来源,培育互助队伍,增加互助内容,从无偿到无偿、低偿相结合,探索建立标准规范的服务管理评估制度,机构养老与社区居家养老互联互通,最终尝试建立圈层化、整合化、网络化、制度化的农村互助型社会养老体系。  相似文献   
6.
This research note reflects on the gaps and limitations confronting the development of ethical principles regarding the accessibility of large-scale data for civil society organizations (CSOs). Drawing upon a systematic scoping study on the use of data in the United Kingdom (UK) civil society, it finds that there are twin needs to conceptualize accessibility as more than mere availability of data, as well as examine the use of data among CSOs more generally. In order to deal with the apparent “digital divide” in UK civil society – where, despite extensive government rhetoric about data openness, organizations face not only the barriers of limited time, funds, and expertise to harness data but also the lack of representation within existing data – we present a working model in which ethical concerns accompanying data utilization by civil society may be better accounted. This suggests there is a need for further research into the nexus of civil society and data upon which interdisciplinary discussion about the ethical dimensions of engagement with data, particularly informed by insight from the social sciences, can be predicated.  相似文献   
7.
讨论线偏振光入射 ,其电矢量与入射面有夹角 (该夹角称线偏振光的振动方位角 )时 ,反射光与折射光的偏振态 ,以及在全反射条件下 ,反射光的偏振态和获得圆偏振光的条件  相似文献   
8.
Civil society has been considered pivotal to democracy, but the causes of its performance have remained controversial. According to one view the political context is a critical factor in shaping the contours of civil society. Another suggests that whether democracy prevails is contingent on society itself and the associations comprising it. In a test of these views it was assumed that if society prevails associations would vary by type. If the state is more important, then associations would be expected to score similarly on the democratic scale. It was also expected that variation among the types of performance would cut across group categories, reflecting general attributes of the polity. Data were derived from a survey conducted among voluntary associations in Israel (n = 360). Findings showed that (a) associations scored similarly on the democratic scale, (b) the scores for the democratic performance were not influenced by group category, and (c) the least performed function was integration.  相似文献   
9.
虚拟社会与道德构建   总被引:1,自引:0,他引:1  
随着网络的普及 ,虚拟社会中人们的思想、行为、生存方式都发生了新的变化。虚拟社会具有虚拟性、自由性、开放性、非人性化的特点 ;虚拟社会的自由和民主精神、权利意识和平等意识、自主精神、奉献精神、开放思想为道德建设提供了新的生长点 ,但同时带来了一系列负效应。因此 ,道德建设要采取一系列相应的措施 ,以构造文明虚拟社会  相似文献   
10.
幸福指数的提升与和谐社会的构建   总被引:7,自引:0,他引:7  
构建社会主义和谐社会,不但要关注经济硬指标,更要关注人民群众的切身感受。"幸福指数"是衡量社会和谐与否的重要指标,关注幸福指数是科学发展观的充分体现。要提升人民群众的幸福感,促进社会和谐,就必须坚持社会公正,将“幸福指数”变为现实,同时还须避免对幸福指数的错误倾向。  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