全文获取类型
收费全文 | 29570篇 |
免费 | 2382篇 |
国内免费 | 506篇 |
专业分类
耳鼻咽喉 | 284篇 |
儿科学 | 1903篇 |
妇产科学 | 670篇 |
基础医学 | 4939篇 |
口腔科学 | 738篇 |
临床医学 | 2859篇 |
内科学 | 2104篇 |
皮肤病学 | 87篇 |
神经病学 | 4847篇 |
特种医学 | 533篇 |
外科学 | 1012篇 |
综合类 | 2821篇 |
现状与发展 | 5篇 |
一般理论 | 5篇 |
预防医学 | 5214篇 |
眼科学 | 456篇 |
药学 | 2546篇 |
21篇 | |
中国医学 | 988篇 |
肿瘤学 | 426篇 |
出版年
2024年 | 96篇 |
2023年 | 480篇 |
2022年 | 820篇 |
2021年 | 1148篇 |
2020年 | 1162篇 |
2019年 | 1037篇 |
2018年 | 912篇 |
2017年 | 1021篇 |
2016年 | 1075篇 |
2015年 | 994篇 |
2014年 | 1574篇 |
2013年 | 2295篇 |
2012年 | 1531篇 |
2011年 | 1602篇 |
2010年 | 1441篇 |
2009年 | 1417篇 |
2008年 | 1415篇 |
2007年 | 1413篇 |
2006年 | 1198篇 |
2005年 | 1067篇 |
2004年 | 957篇 |
2003年 | 787篇 |
2002年 | 673篇 |
2001年 | 588篇 |
2000年 | 532篇 |
1999年 | 476篇 |
1998年 | 487篇 |
1997年 | 423篇 |
1996年 | 386篇 |
1995年 | 364篇 |
1994年 | 310篇 |
1993年 | 272篇 |
1992年 | 262篇 |
1991年 | 214篇 |
1990年 | 225篇 |
1989年 | 170篇 |
1988年 | 159篇 |
1987年 | 143篇 |
1986年 | 170篇 |
1985年 | 201篇 |
1984年 | 187篇 |
1983年 | 114篇 |
1982年 | 96篇 |
1981年 | 129篇 |
1980年 | 111篇 |
1979年 | 70篇 |
1978年 | 66篇 |
1977年 | 35篇 |
1976年 | 41篇 |
1975年 | 19篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
In this article, we draw on recent scholarly work in the poststructuralist analysis of policy to consider how policy itself functions as a key site in the constitution of alcohol ‘problems’, and the political implications of these problematisations. We do this by examining Australian alcohol policy as it relates to young adults (18–24 years old). Our critical analysis focuses on three national alcohol policies (1990, 2001 and 2006) and two Victorian state alcohol policies (2008 and 2013), which together span a 25-year period. We argue that Australian alcohol policies have conspicuously ignored young adult men, despite their ongoing over-representation in the statistical ‘evidence base’ on alcohol-related harm, while increasingly problematising alcohol consumption amongst other population subgroups. We also identify the development of a new problem representation in Australian alcohol policy, that of ‘intoxication’ as the leading cause of alcohol-related harm and rising hospital admissions, and argue that changes in the classification and diagnosis of intoxication may have contributed to its prioritisation and problematisation in alcohol policy at the expense of other forms of harm. Finally, we draw attention to how preliminary and inconclusive research on the purported association between binge drinking and brain development in those under 25 years old has been mobilised prematurely to support calls to increase the legal purchasing age from 18 to 21 years. Our critical analysis of the treatment of these three issues – gender, intoxication, and brain development – is intended to highlight the ways in which policy functions as a key site in the constitution of alcohol ‘problems’. 相似文献
3.
Eric E Rasmussen Autumn Shafer Malinda J. Colwell Shawna White Narissra Punyanunt-Carter Rebecca L. Densley 《Journal of Children and Media》2016,10(4):443-461
This study explored the relationship between active mediation, exposure to Daniel Tiger’s Neighborhood, and key indicators of preschoolers’ social and emotional development. One hundred and twenty-seven children aged 2–6 either watched or did not watch 10 episodes of Daniel Tiger’s Neighborhood over a two-week period. Results revealed that preschoolers who watched the program exhibited higher levels of empathy, self-efficacy, and emotion recognition when their regular TV-watching experiences are frequently accompanied by active mediation. This was especially true for younger preschoolers and preschoolers from low-income families. Implications for policy-makers, parents, producers of prosocial programming, and educators are discussed. 相似文献
4.
5.
Shi Li 《Early child development and care》2016,186(3):466-479
Most scholars consider gratitude as a moral emotion, with only few seeing it as a character trait. As a result, no systematic mechanism has ever been attempted to develop gratitude in children. Given the social issue of widespread lack of gratitude in the one-child generations of China, this article attempts to outline a mechanism of parental moral education for gratitude development. The mechanism is underpinned by love, induction and discipline; and theoretically justified in accordance with key psychological and sociological theories, such as Piaget's theory of moral development, Kohlberg's moral stages theory, attachment theory, Hoffman's internalisation theory, Rest's social justice theory and Baumrind's parenting styles theory. The benefits and potential risks of each strategy of the mechanism are addressed. 相似文献
6.
7.
皮质发育障碍模型的建立及其致痫敏感性的研究 总被引:1,自引:0,他引:1
目的:建立皮质发育障碍模型,探讨皮质发育障碍模型的敏感性。方法:在SD大鼠孕17d腹腔注入1,3-二氯乙烯-亚硝基脲(BCNU)制作皮质发育障碍模型;Nissl染色观察P60d仔鼠病理变化;选取P60d雄性仔鼠,腹腔注射氯化锂-毛果芸香碱,分别比较两组大鼠癫发生的潜伏期、持续状态时间和死亡率。结果:同龄仔鼠脑组织湿重实验组比对照组显著减轻(P<0.01);Nissl染色显示皮质变薄、皮质层次紊乱、海马区域异位细胞异常聚集;有皮质发育障碍的仔鼠注射氯化锂-毛果芸香碱后,癫发生的潜伏期显著缩短(P<0.01),癫持续状态时间延长(P<0.01),死亡率显著升高(P<0.05)。结论:BCNU致皮质发育障碍模型具有癫易感性。 相似文献
8.
分析43例烧伤初期Ⅱ°创面演变为临床Ⅲ°烧伤创面的病人资料,发现演变多发生在伤后第1~21天,发生的原因主要与清创、休克及并发症有关。因此,除进一步减少创面损伤外,应注意提高病人的机体抵抗力,处理好饶伤初期Ⅱ°创面。 相似文献
9.
本文报告用亚致死剂量的 S—31183(类保幼激素)处理三带喙库蚊幼虫对其发育影响的研究,结果表明处理后蛹期死亡率明显高于幼虫期,并且与剂量大小有关。S—31183处理幼虫并不影响幼虫的发育时间,但可使幼虫化蛹时蜕皮受阻与羽化受到一定的抑制。 相似文献
10.
在新疆石河子市远郊缺碘地甲病区7~17岁儿童中取样,检测智力、精神运动功能、身高、体重和骨龄,发现精神运动发育障碍和骨龄落后的程度及发生频度明显高于非病区;而智力落后和体格发育落后两区无显著差异。根据这一发现认为在“亚地克病”诊断中,“精神运动发育测验”较“比内测验”更具有特异性和敏感性;建议在“出生、居住于缺碘地甲病区”前提下,将精神运动发育障碍和智力落后并列为主要条件。另根据地克病的分型原则,提出“亚地克病”的分型标准。 相似文献