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   1422949篇
  免费   106142篇
  国内免费   2535篇
耳鼻咽喉   20426篇
儿科学   48732篇
妇产科学   38007篇
基础医学   201888篇
口腔科学   40334篇
临床医学   122111篇
内科学   289455篇
皮肤病学   31640篇
神经病学   112461篇
特种医学   55870篇
外国民族医学   682篇
外科学   213914篇
综合类   28267篇
现状与发展   3篇
一般理论   427篇
预防医学   110677篇
眼科学   30861篇
药学   103890篇
  2篇
中国医学   3166篇
肿瘤学   78813篇
  2021年   11392篇
  2019年   12219篇
  2018年   17422篇
  2017年   13173篇
  2016年   14055篇
  2015年   16172篇
  2014年   22319篇
  2013年   32545篇
  2012年   45797篇
  2011年   48341篇
  2010年   28194篇
  2009年   26471篇
  2008年   44223篇
  2007年   47392篇
  2006年   46916篇
  2005年   46160篇
  2004年   44835篇
  2003年   42924篇
  2002年   40526篇
  2001年   67289篇
  2000年   69650篇
  1999年   59249篇
  1998年   16347篇
  1997年   14737篇
  1996年   15137篇
  1995年   14251篇
  1994年   13556篇
  1993年   12532篇
  1992年   46229篇
  1991年   45136篇
  1990年   43740篇
  1989年   41626篇
  1988年   38311篇
  1987年   37530篇
  1986年   34911篇
  1985年   33523篇
  1984年   25017篇
  1983年   20979篇
  1982年   12149篇
  1981年   11094篇
  1979年   22036篇
  1978年   15270篇
  1977年   12881篇
  1976年   11997篇
  1975年   13037篇
  1974年   15084篇
  1973年   14520篇
  1972年   13297篇
  1971年   12048篇
  1970年   11408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.
6.
7.

Aims

To examine the influence of pre-existing psychiatric disorder on the choice of treatment in patients with gynaecological cancer.

Materials and methods

The analyses were based on all patients who underwent surgical treatment for endometrial, ovarian or cervical cancer who were registered in the Danish Gynecological Cancer Database in the years 2007–2014 (3059 patients with ovarian cancer, 5100 patients with endometrial cancer and 1150 with cervical cancer). Logistic regression model and Cox regression model, adjusted for relevant confounders, were used to estimate the effect of pre-existing psychiatric disorder on the course of cancer treatment. Our outcomes were (i) presurgical oncological treatment, (ii) macroradical surgery for patients with ovarian cancer, (iii) radiation/chemotherapy within 30 days and 100 days after surgery and (iv) time from surgery to first oncological treatment.

Results

In the group of patients with ovarian cancer, more patients with a psychiatric disorder received macroradical surgery versus patients without a psychiatric disorder, corresponding to an adjusted odds ratio of 1.24 (95% confidence interval 0.62–2.41) and the chance for having oncological treatment within 100 days was odds ratio = 1.26 (95% confidence interval 0.77–2.10). As for patients with endometrial cancer, all outcome estimates were close to unity. The adjusted odds ratio for oncological treatment within 30 days after surgery in patients with cervical cancer with a history of psychiatric disorder was 0.20 (95% confidence interval 0.03–1.54).

Conclusions

We did not find any significant differences in the treatment of ovarian and endometrial cancer in patients with pre-existing psychiatric diagnoses. When it comes to oncological treatment, we suggest that increased attention should be paid to patients with cervical cancer having a pre-existing psychiatric diagnosis.  相似文献   
8.
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   
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