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   1318178篇
  免费   100792篇
  国内免费   2123篇
耳鼻咽喉   18874篇
儿科学   45628篇
妇产科学   36147篇
基础医学   187612篇
口腔科学   34048篇
临床医学   117145篇
内科学   265678篇
皮肤病学   28708篇
神经病学   104383篇
特种医学   51954篇
外国民族医学   661篇
外科学   199476篇
综合类   27785篇
现状与发展   1篇
一般理论   419篇
预防医学   100391篇
眼科学   28722篇
药学   97508篇
  2篇
中国医学   2493篇
肿瘤学   73458篇
  2019年   9828篇
  2018年   14004篇
  2017年   10628篇
  2016年   11640篇
  2015年   13263篇
  2014年   18353篇
  2013年   28049篇
  2012年   38760篇
  2011年   40949篇
  2010年   24297篇
  2009年   23241篇
  2008年   39278篇
  2007年   42061篇
  2006年   42420篇
  2005年   41306篇
  2004年   40374篇
  2003年   39079篇
  2002年   38222篇
  2001年   64333篇
  2000年   66737篇
  1999年   56742篇
  1998年   15574篇
  1997年   14147篇
  1996年   14548篇
  1995年   13789篇
  1994年   13015篇
  1993年   12077篇
  1992年   44740篇
  1991年   43649篇
  1990年   42380篇
  1989年   40270篇
  1988年   37060篇
  1987年   36373篇
  1986年   33740篇
  1985年   32412篇
  1984年   24311篇
  1983年   20441篇
  1982年   11944篇
  1981年   10851篇
  1979年   21445篇
  1978年   14919篇
  1977年   12632篇
  1976年   11771篇
  1975年   12688篇
  1974年   14734篇
  1973年   14175篇
  1972年   12996篇
  1971年   11755篇
  1970年   11082篇
  1969年   10050篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.

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   
5.
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   
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