收费全文 | 4248篇 |
免费 | 303篇 |
国内免费 | 68篇 |
耳鼻咽喉 | 1篇 |
儿科学 | 33篇 |
妇产科学 | 13篇 |
基础医学 | 393篇 |
口腔科学 | 9篇 |
临床医学 | 340篇 |
内科学 | 553篇 |
皮肤病学 | 18篇 |
神经病学 | 749篇 |
特种医学 | 58篇 |
外科学 | 63篇 |
综合类 | 350篇 |
一般理论 | 4篇 |
预防医学 | 323篇 |
眼科学 | 2篇 |
药学 | 1616篇 |
中国医学 | 60篇 |
肿瘤学 | 34篇 |
2024年 | 4篇 |
2023年 | 46篇 |
2022年 | 69篇 |
2021年 | 140篇 |
2020年 | 117篇 |
2019年 | 154篇 |
2018年 | 130篇 |
2017年 | 164篇 |
2016年 | 142篇 |
2015年 | 129篇 |
2014年 | 231篇 |
2013年 | 787篇 |
2012年 | 216篇 |
2011年 | 240篇 |
2010年 | 223篇 |
2009年 | 216篇 |
2008年 | 188篇 |
2007年 | 204篇 |
2006年 | 181篇 |
2005年 | 150篇 |
2004年 | 95篇 |
2003年 | 101篇 |
2002年 | 86篇 |
2001年 | 78篇 |
2000年 | 83篇 |
1999年 | 55篇 |
1998年 | 48篇 |
1997年 | 49篇 |
1996年 | 44篇 |
1995年 | 31篇 |
1994年 | 42篇 |
1993年 | 23篇 |
1992年 | 13篇 |
1991年 | 19篇 |
1990年 | 8篇 |
1989年 | 11篇 |
1988年 | 11篇 |
1987年 | 15篇 |
1986年 | 5篇 |
1985年 | 13篇 |
1984年 | 12篇 |
1983年 | 10篇 |
1981年 | 5篇 |
1980年 | 5篇 |
1979年 | 6篇 |
1978年 | 5篇 |
1977年 | 3篇 |
1976年 | 6篇 |
1975年 | 2篇 |
1973年 | 2篇 |
Methods: The sample consisted of 149 male abstinent heroin abusers from four addiction rehabilitation centers in China. Based on their abstinence lengths, they were labeled as short-term, medium-term, and long-term abstainer participants respectively. All participants completed a stress-imagery task and rated craving by visual analog scale.
Results: There was a significant interaction of cue type and abstinence length. There was no difference on the craving induced by three types of cue words in the short-term group. In the medium-term group, craving induced by negative social-cue words was significantly stronger than that by negative physiological-cue words, but not that by drug-cue words. In the long-term group, the craving induced by negative social-cue words remained the strongest, significantly stronger than that by both drug-cue words and negative physiological-cue words.
Conclusion: Negative social-cue words presented in the current study retain the ability to induce craving in heroin abstainers; this finding suggests that negative social cues encountered under more general circumstances could be a risk factor for relapse. 相似文献
Over the last five years evidence has been rapidly mounting that treatment may potentially work in young people, but as yet it is not as extensive as that for adults. The interventions that appear most fruitful are those based on learning theory, e.g. cognitive behavioural therapy and family therapy. Outcome studies in young people demonstrate substantial variability in substance use and misuse following treatment. From the UK perspective, the evidence is almost entirely USA based, and these evaluations of non-UK treatment programmes for young people cannot be simply transferred or transported to UK healthcare settings. This has significant implications for practice and policy.
At this stage, 'guidelines' or 'guidance' that is available is either not directed at young people and/or is largely gleaned from the USA literature. In addition, it does not adequately capture the complexity of cases at front-line specialist settings. The management of young substance misusers in the UK is, in the main, 'beyond guidelines and guidance'.
The restricted treatment service network for young people in the UK makes the potential for undertaking studies on treatment effectiveness extremely limited, but because there is evidence of a growing number of young people requiring treatment, such specialist drug services require evaluation. Serious consideration of the establishment and funding of evaluation of treatment interventions to be delivered to young substance misusers in the UK is urgently needed. 相似文献