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   2418388篇
  免费   173976篇
  国内免费   4487篇
耳鼻咽喉   35801篇
儿科学   78063篇
妇产科学   68002篇
基础医学   340301篇
口腔科学   69697篇
临床医学   207693篇
内科学   478342篇
皮肤病学   53786篇
神经病学   191128篇
特种医学   95932篇
外国民族医学   1056篇
外科学   372692篇
综合类   53862篇
现状与发展   7篇
一般理论   778篇
预防医学   175707篇
眼科学   55953篇
药学   180993篇
  6篇
中国医学   5156篇
肿瘤学   131896篇
  2018年   24080篇
  2016年   20213篇
  2015年   22999篇
  2014年   31884篇
  2013年   48598篇
  2012年   66412篇
  2011年   70294篇
  2010年   41719篇
  2009年   39584篇
  2008年   66823篇
  2007年   72253篇
  2006年   72596篇
  2005年   70588篇
  2004年   68758篇
  2003年   66475篇
  2002年   65239篇
  2001年   113997篇
  2000年   117772篇
  1999年   99995篇
  1998年   27059篇
  1997年   24492篇
  1996年   24331篇
  1995年   23025篇
  1994年   21637篇
  1993年   20188篇
  1992年   78377篇
  1991年   76322篇
  1990年   74497篇
  1989年   72029篇
  1988年   66770篇
  1987年   65782篇
  1986年   62169篇
  1985年   59264篇
  1984年   44479篇
  1983年   37615篇
  1982年   22187篇
  1981年   20200篇
  1979年   41380篇
  1978年   29110篇
  1977年   25037篇
  1976年   23004篇
  1975年   25679篇
  1974年   30240篇
  1973年   29232篇
  1972年   27621篇
  1971年   25493篇
  1970年   24149篇
  1969年   22733篇
  1968年   21068篇
  1967年   18913篇
排序方式: 共有10000条查询结果,搜索用时 11 毫秒
1.
2.
3.
4.
5.
6.
7.
8.

Introduction

Physician communication impacts patient outcomes. However, communication skills, especially around difficult conversations, remain suboptimal, and there is no clear way to determine the validity of entrustment decisions. The aims of this study were to 1) describe the development of a simulation-based mastery learning (SBML) curriculum for breaking bad news (BBN) conversation skills and 2) set a defensible minimum passing standard (MPS) to ensure uniform skill acquisition among learners.

Innovation

An SBML BBN curriculum was developed for fourth-year medical students. An assessment tool was created to evaluate the acquisition of skills involved in a BBN conversation. Pilot testing was completed to confirm improvement in skill acquisition and set the MPS.

Outcomes

A BBN assessment tool containing a 15-item checklist and six scaled items was developed. Students' checklist performance improved significantly at post-test compared to baseline (mean 65.33%, SD = 12.09% vs mean 88.67%, SD = 9.45%, P < 0.001). Students were also significantly more likely to have at least a score of 4 (on a five-point scale) for the six scaled questions at post-test. The MPS was set at 80%, requiring a score of 12 items on the checklist and at least 4 of 5 for each scaled item. Using the MPS, 30% of students would require additional training after post-testing.

Comments

We developed a SBML curriculum with a comprehensive assessment of BBN skills and a defensible competency standard. Future efforts will expand the mastery model to larger cohorts and assess the impact of rigorous education on patient care outcomes.  相似文献   
9.

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   
10.
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   
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