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   1430588篇
  免费   127530篇
  国内免费   4245篇
耳鼻咽喉   23306篇
儿科学   49857篇
妇产科学   37564篇
基础医学   186985篇
口腔科学   35207篇
临床医学   137742篇
内科学   303884篇
皮肤病学   35381篇
神经病学   115415篇
特种医学   57344篇
外国民族医学   660篇
外科学   235303篇
综合类   27346篇
现状与发展   73篇
一般理论   390篇
预防医学   103515篇
眼科学   31285篇
药学   96436篇
  2篇
中国医学   2446篇
肿瘤学   82222篇
  2021年   11010篇
  2019年   11341篇
  2018年   20197篇
  2017年   16946篇
  2016年   18952篇
  2015年   20441篇
  2014年   31985篇
  2013年   41282篇
  2012年   41997篇
  2011年   44045篇
  2010年   32937篇
  2009年   35554篇
  2008年   42757篇
  2007年   43812篇
  2006年   46359篇
  2005年   42714篇
  2004年   41125篇
  2003年   39013篇
  2002年   38368篇
  2001年   67679篇
  2000年   69406篇
  1999年   59519篇
  1998年   18664篇
  1997年   17060篇
  1996年   17348篇
  1995年   16468篇
  1994年   14559篇
  1993年   13276篇
  1992年   45857篇
  1991年   44833篇
  1990年   43256篇
  1989年   41254篇
  1988年   37857篇
  1987年   37061篇
  1986年   34485篇
  1985年   32981篇
  1984年   24678篇
  1983年   20789篇
  1982年   12229篇
  1981年   11078篇
  1979年   21664篇
  1978年   15163篇
  1977年   12930篇
  1976年   11942篇
  1975年   12899篇
  1974年   14901篇
  1973年   14349篇
  1972年   13243篇
  1971年   11947篇
  1970年   11296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.

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   
7.
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   
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