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   177340篇
  免费   43559篇
  国内免费   245篇
耳鼻咽喉   2991篇
儿科学   7221篇
妇产科学   3096篇
基础医学   28857篇
口腔科学   8299篇
临床医学   18059篇
内科学   45655篇
皮肤病学   9982篇
神经病学   20761篇
特种医学   4278篇
外国民族医学   2篇
外科学   26173篇
综合类   497篇
一般理论   48篇
预防医学   15783篇
眼科学   3574篇
药学   13217篇
中国医学   1358篇
肿瘤学   11293篇
  2023年   633篇
  2022年   576篇
  2021年   3087篇
  2020年   5995篇
  2019年   12823篇
  2018年   13052篇
  2017年   12950篇
  2016年   13537篇
  2015年   13774篇
  2014年   13880篇
  2013年   15790篇
  2012年   10663篇
  2011年   10808篇
  2010年   12188篇
  2009年   7613篇
  2008年   7571篇
  2007年   6821篇
  2006年   6565篇
  2005年   6393篇
  2004年   5900篇
  2003年   5484篇
  2002年   5313篇
  2001年   3994篇
  2000年   4127篇
  1999年   2992篇
  1998年   507篇
  1996年   346篇
  1992年   1315篇
  1991年   1202篇
  1990年   1120篇
  1989年   1013篇
  1988年   907篇
  1987年   909篇
  1986年   846篇
  1985年   819篇
  1984年   591篇
  1983年   475篇
  1979年   612篇
  1978年   361篇
  1976年   324篇
  1975年   359篇
  1974年   547篇
  1973年   510篇
  1972年   442篇
  1971年   405篇
  1970年   479篇
  1969年   443篇
  1968年   419篇
  1967年   381篇
  1966年   326篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
5.
Abstract

Objectives: This study examined word use as an indicator of interpersonal positive reframing in daily conversations of couples coping with breast cancer and as a predictor of stress.

Design: The Electronically Activated Recorder (EAR) and Linguistic Inquiry and Word Count (LIWC) were used to examine naturally occurring word use conceptually linked to positive reframing (positive emotion, negative emotion, and cognitive processing words).

Sample: Fifty-two couples coping with breast cancer.

Methods: Couples wore the EAR, a device participants wear, that audio-recorded over one weekend (>16,000 sound files), and completed self-reports of positive reframing (COPE) and stress (Perceived Stress Scale). LIWC, a software program, measured word use.

Findings: Both partners’ word use (i.e., positive emotion and cognitive processing words) was associated with their own reported positive reframing, and spouses’ word use was also indicative of patients’ positive reframing. Results also revealed that, in general, words indicating positive reframing predicted lower levels of stress.

Conclusions: Findings supported the hypothesis that partners—and particularly spouses of breast cancer patients—may assist each other’s coping by positively reframing the cancer experience and other negative experiences in conversation.  相似文献   
6.
Objective: To assess the quality of images and video clips of fetal central nervous (CNS) structures obtained by ultrasound and transmitted via tele-ultrasound from Brazil to Australia.

Methods: In this cross-sectional study, 15 normal singleton pregnant women between 20 and 26 weeks were selected. Fetal CNS structures were obtained by images and video clips. The exams were transmitted in real-time using a broadband internet and an inexpensive video streaming device. Four blinded examiners evaluated the quality of the exams using the Likert scale. We calculated the mean, standard deviation, mean difference, and p values were obtained from paired t tests.

Results: The quality of the original video clips was slightly better than that observed by the transmitted video clips; mean difference considering all observers = 0.23 points. In 47/60 comparisons (78.3%; 95% CI?=?66.4–86.9%) the quality of the video clips were judged to be the same. In 182/240 still images (75.8%; 95% CI?=?70.0–80.8%) the scores of transmitted image were considered the same as the original.

Conclusion: We demonstrated that long distance tele-ultrasound transmission of fetal CNS structures using an inexpensive video streaming device provided images of subjective good quality.  相似文献   
7.
8.
9.

Objective

To explore from a gender perspective the association with subjective health of the interaction between education and household arrangements within the framework of social determinants of health placed at the micro and mezzo levels.

Methods

The data comes from the Spanish sample of the European Union Statistics on Income and Living Conditions for 2014. Independent logistic regression models for men and women were run to analyze the association with subjective health of the interaction between education and household arrangements. An additive model was run to assess possible advantages over the interaction approach.

Results

The interaction models show a lower or even no significant effect on health of household arrangements usually negatively associated with health among individuals with high education, displaying specific patterns according to sex.

Conclusions

Health profiles of women and men are more precisely drawn if both social determinants of health are combined. Among the women, the important role was confirmed of both social determinants of health in understanding their health inequalities. Among the men, mainly those with low educational achievement, the interaction revealed that the household was a more meaningful social determinant of health. This could enable the definition of more efficient public policies to reduce health and gender inequalities.  相似文献   
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