全文获取类型
收费全文 | 6341篇 |
免费 | 241篇 |
国内免费 | 16篇 |
专业分类
耳鼻咽喉 | 50篇 |
儿科学 | 150篇 |
妇产科学 | 240篇 |
基础医学 | 1398篇 |
口腔科学 | 114篇 |
临床医学 | 465篇 |
内科学 | 1381篇 |
皮肤病学 | 111篇 |
神经病学 | 490篇 |
特种医学 | 129篇 |
外科学 | 442篇 |
综合类 | 23篇 |
一般理论 | 2篇 |
预防医学 | 489篇 |
眼科学 | 117篇 |
药学 | 711篇 |
中国医学 | 22篇 |
肿瘤学 | 264篇 |
出版年
2023年 | 37篇 |
2022年 | 62篇 |
2021年 | 104篇 |
2020年 | 66篇 |
2019年 | 89篇 |
2018年 | 138篇 |
2017年 | 108篇 |
2016年 | 135篇 |
2015年 | 155篇 |
2014年 | 182篇 |
2013年 | 277篇 |
2012年 | 431篇 |
2011年 | 437篇 |
2010年 | 224篇 |
2009年 | 176篇 |
2008年 | 256篇 |
2007年 | 350篇 |
2006年 | 339篇 |
2005年 | 262篇 |
2004年 | 298篇 |
2003年 | 265篇 |
2002年 | 261篇 |
2001年 | 119篇 |
2000年 | 141篇 |
1999年 | 128篇 |
1998年 | 44篇 |
1992年 | 78篇 |
1991年 | 50篇 |
1990年 | 77篇 |
1989年 | 72篇 |
1988年 | 58篇 |
1987年 | 45篇 |
1986年 | 70篇 |
1985年 | 52篇 |
1984年 | 52篇 |
1983年 | 33篇 |
1982年 | 29篇 |
1979年 | 57篇 |
1978年 | 59篇 |
1977年 | 43篇 |
1976年 | 39篇 |
1975年 | 60篇 |
1974年 | 50篇 |
1973年 | 49篇 |
1972年 | 52篇 |
1971年 | 55篇 |
1970年 | 52篇 |
1969年 | 47篇 |
1968年 | 32篇 |
1967年 | 43篇 |
排序方式: 共有6598条查询结果,搜索用时 15 毫秒
101.
102.
103.
104.
105.
Fish consumption is of great importance to children’s health and is essential for neurodevelopment, which begins in pregnancy and continues throughout early childhood and into adolescence. However, fish consumption presents conflicting health outcomes associated with its nutritional benefits and its adverse contaminant risks, because both avoiding fish as well as the consumption of contaminated fish can potentially harm children. This may be challenging to communicate. The present review was performed to assess the current knowledge and recommendations around ‘smart’ fish-consumption decisions. Health Canada advises, as well as other advisories and guides, that fish should be consumed for its health benefits, while also informing consumers, especially women and children, to limit certain fish consumption. The current literature must attempt to handle the challenges inherent in communicating the dilemmas of children’s fish consumption. Incorporation of new knowledge translation strategies are proposed as a means to raise the level of knowledge about optimal fish consumption practices. 相似文献
106.
107.
Background: The first studies concerning changes in moral virtues during alcohol addiction therapy were published during the last decade. However, as all of these studies applied a variable-oriented approach, it is impossible to capture differences between starting points and changes in variables of interest. Method: In this study, we employed a person-oriented approach to identify trajectories of change in two moral virtues—forgiveness and gratitude—during alcohol addiction treatment. The sample consisted of 358 alcohol-dependent individuals who were receiving outpatient therapy. Measurements were taken (1) at the beginning of the basic treatment, (2) after its completion (5–7?weeks from baseline), and (3) about six months later. Three forgiveness scales and the Gratitude Questionnaire (GQ-6) were used to assess the patients’ moral virtues. Results: Latent class growth analysis (LCGA) revealed four trajectories for self-forgiveness and gratitude, and three trajectories for forgiveness of others and feeling forgiven by God. For patients with a low baseline level of moral virtues, the changes varied depending on the kind of moral virtue. Patients with a relatively high initial level of moral virtues maintained that level in subsequent measurements. Significant correlates of trajectory class membership were gender, education, age, religiosity, diagnosis of coexisting psychiatric disorders, and frequency of attending Alcoholics Anonymous (AA) meetings. Conclusions: This study highlights the clinical importance of considering differences at the baseline level and in changes of forgiveness and gratitude, as well as personal and alcohol-related correlates of trajectory group membership among people who participate in alcohol addiction therapy. 相似文献
108.
109.