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   91311篇
  免费   9054篇
  国内免费   175篇
耳鼻咽喉   1245篇
儿科学   2671篇
妇产科学   2024篇
基础医学   13339篇
口腔科学   2174篇
临床医学   11294篇
内科学   16341篇
皮肤病学   1370篇
神经病学   7486篇
特种医学   2983篇
外国民族医学   11篇
外科学   12540篇
综合类   1795篇
一般理论   74篇
预防医学   10366篇
眼科学   1967篇
药学   7162篇
  1篇
中国医学   87篇
肿瘤学   5610篇
  2021年   1257篇
  2020年   826篇
  2019年   1259篇
  2018年   1537篇
  2017年   1128篇
  2016年   1241篇
  2015年   1402篇
  2014年   1858篇
  2013年   2909篇
  2012年   3943篇
  2011年   4224篇
  2010年   2293篇
  2009年   2178篇
  2008年   3686篇
  2007年   4008篇
  2006年   3892篇
  2005年   3886篇
  2004年   3671篇
  2003年   3465篇
  2002年   3347篇
  2001年   2893篇
  2000年   3005篇
  1999年   2665篇
  1998年   1182篇
  1997年   968篇
  1996年   959篇
  1995年   848篇
  1994年   875篇
  1993年   801篇
  1992年   2234篇
  1991年   2167篇
  1990年   2046篇
  1989年   1978篇
  1988年   1901篇
  1987年   1882篇
  1986年   1824篇
  1985年   1784篇
  1984年   1468篇
  1983年   1350篇
  1982年   892篇
  1981年   773篇
  1979年   1289篇
  1978年   930篇
  1977年   816篇
  1976年   769篇
  1975年   762篇
  1974年   917篇
  1973年   818篇
  1972年   775篇
  1971年   690篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
Aims: Relapse rates among cigarette smokers are high. Few studies have examined time-to-relapse using survival analysis in racially/ethnically diverse smokers and initial abstinence criteria have been inconsistent or unspecified. This study compared survival curves using two common definitions of initial abstinence. We hypothesized greater relapse rates among participants abstinent for only 24 hours (h) at the end-of-therapy (EOT) compared with 7 days. Methods: Adult smokers (59% Black, 22% Hispanic and 17% White) received 8-sessions of group cognitive behavioural therapy (CBT) plus transdermal nicotine patches and were assessed monthly up to 12 months post-EOT. Participants reporting abstinence (7-day point prevalence abstinence [ppa] or 24-h ppa) at the EOT were included in Kaplan–Meier curves. Results: Of 301 participants, 120 (40%) reported 7-day ppa at the EOT and an additional 29 (10%) reported 24-h ppa only. Over the 12-month follow-up period, nearly 50% remained abstinent. Of those who resumed smoking, most relapses occurred within the first three months. Survival curves indicated that median survival was 207 and 225 days for 7-day and 24-h definitions of abstinence, respectively. The difference in time-to-relapse between participants abstinent for 24?h at the EOT versus 7-days was not significant (p?=?0.14). Conclusions: Operationalization of initial abstinence is important for relapse analyses and comparisons of survival curves across samples. Participants reported high rates of abstinence and relapse rates were relatively low. Contrary to expectations, 24-h ppa at the EOT was not associated with greater relapse than 7-day abstinence. This suggests either measure may be utilized in relapse prevention research in racially/ethnically diverse treatment-seekers.  相似文献   
4.
5.
In 1963, Goffman argued that forming a group based on shared stigma may provide benefits. However, there is no empirical research on whether perception that a separate, unique, coherent group exists (i.e., group entitativity) influences coping, such as educating others or secrecy, for the stigmatized individual or his or her spouse. Further, little is known about how spouses influence each other in terms of promoting the education of others about a stigmatizing condition, especially when it comes to the role of believing that stigma-based groups, to which they may both belong, exist. This study provides a step toward bridging this gap in the research by applying the label management model in efforts to understand coping for couples in which one spouse is diagnosed with genetic mutations leading to alpha-1 antitrypsin deficiency (AATD). This study included 50 married couples in which one spouse is diagnosed with genetic mutations leading to alpha-1 antitrypsin deficiency (AATD). We found that group entitativity related to those with AATD counterbalanced the influence of genetic stigma on spouses’ intentions to keep the diagnosis secret or to educate others about it. Intrapersonal and interpersonal influences appeared among spouses. Attention is needed on the power of creating groups for stigmatized persons and their relatives. Indeed, people live within a dynamic world of group entities, and multiple social identities including spousal and familial. While attention has been paid to the diffusion of stigmas to loved ones, less has been paid to the uplift of group entities for them.  相似文献   
6.
7.
8.
9.
10.
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