收费全文 | 3520篇 |
免费 | 154篇 |
国内免费 | 10篇 |
管理学 | 507篇 |
劳动科学 | 1篇 |
民族学 | 59篇 |
人才学 | 3篇 |
人口学 | 320篇 |
丛书文集 | 309篇 |
理论方法论 | 245篇 |
综合类 | 503篇 |
社会学 | 1214篇 |
统计学 | 523篇 |
2024年 | 4篇 |
2023年 | 35篇 |
2022年 | 44篇 |
2021年 | 52篇 |
2020年 | 66篇 |
2019年 | 116篇 |
2018年 | 222篇 |
2017年 | 230篇 |
2016年 | 197篇 |
2015年 | 117篇 |
2014年 | 167篇 |
2013年 | 480篇 |
2012年 | 192篇 |
2011年 | 164篇 |
2010年 | 176篇 |
2009年 | 168篇 |
2008年 | 139篇 |
2007年 | 165篇 |
2006年 | 174篇 |
2005年 | 109篇 |
2004年 | 104篇 |
2003年 | 75篇 |
2002年 | 95篇 |
2001年 | 80篇 |
2000年 | 50篇 |
1999年 | 37篇 |
1998年 | 19篇 |
1997年 | 20篇 |
1996年 | 20篇 |
1995年 | 22篇 |
1994年 | 8篇 |
1993年 | 13篇 |
1992年 | 19篇 |
1991年 | 16篇 |
1990年 | 7篇 |
1989年 | 7篇 |
1988年 | 12篇 |
1987年 | 3篇 |
1986年 | 5篇 |
1985年 | 10篇 |
1984年 | 3篇 |
1983年 | 6篇 |
1982年 | 5篇 |
1980年 | 8篇 |
1979年 | 3篇 |
1975年 | 2篇 |
1974年 | 2篇 |
1972年 | 3篇 |
1971年 | 2篇 |
1964年 | 2篇 |
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Civil societies are usually seen as facilitators of democracy or as oppositional powers withstanding authoritarian rule. However, more and more often civil society organizations (CSOs) appear to contribute to the legitimacy of non-democratic incumbents. Taking the example of contemporary Russia, this paper argues that state funding for CSOs under authoritarian regime conditions serves for securing regime legitimacy in two respects—by supporting CSOs contribution to public welfare and by transmitting state-led legitimacy discourse to the civil society sector. The analysis of applications submitted between 2013 and 2016 to the Presidential Grant Competition (PGC), the biggest public funding programme for CSOs in Russia, shows that the state is (1) supporting CSO activities above all in social, health and education-related fields, and (2) privileging projects that relate to a state-led conservative public discourse not only but foremost within those welfare-related fields. These results highlight the importance of investigating state support to CSOs in order to access the changing role of civil society under authoritarian regime conditions.
相似文献