全文获取类型
收费全文 | 158133篇 |
免费 | 46301篇 |
国内免费 | 396篇 |
学科分类
医药卫生 | 204830篇 |
出版年
2023年 | 507篇 |
2022年 | 835篇 |
2021年 | 3109篇 |
2020年 | 6087篇 |
2019年 | 12419篇 |
2018年 | 12015篇 |
2017年 | 12797篇 |
2016年 | 13576篇 |
2015年 | 13710篇 |
2014年 | 14521篇 |
2013年 | 15695篇 |
2012年 | 9834篇 |
2011年 | 10021篇 |
2010年 | 12240篇 |
2009年 | 8117篇 |
2008年 | 7259篇 |
2007年 | 6241篇 |
2006年 | 6157篇 |
2005年 | 5758篇 |
2004年 | 5656篇 |
2003年 | 5230篇 |
2002年 | 4908篇 |
2001年 | 2310篇 |
2000年 | 2049篇 |
1999年 | 1604篇 |
1998年 | 918篇 |
1997年 | 723篇 |
1996年 | 596篇 |
1995年 | 582篇 |
1994年 | 540篇 |
1993年 | 455篇 |
1992年 | 766篇 |
1991年 | 722篇 |
1990年 | 647篇 |
1989年 | 612篇 |
1988年 | 564篇 |
1987年 | 516篇 |
1986年 | 499篇 |
1985年 | 501篇 |
1984年 | 431篇 |
1983年 | 418篇 |
1982年 | 358篇 |
1981年 | 291篇 |
1980年 | 251篇 |
1979年 | 277篇 |
1978年 | 195篇 |
1977年 | 197篇 |
1976年 | 136篇 |
1974年 | 162篇 |
1973年 | 117篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
2.
3.
4.
Very preterm children are at increased risk of reduced processing speed at 5 years of age,predicted by typical complications of prematurity and prenatal smoking 下载免费PDF全文
5.
Julia H. Vermylen Gordon J. Wood Elaine R. Cohen Jeffrey H. Barsuk William C. McGaghie Diane B. Wayne 《Journal of pain and symptom management》2019,57(3):682-687
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6.
7.
8.
9.
10.
Laparoscopic surgery has several advantages over traditional surgery because it has been shown to be less invasive. The next logical step in the evolution of minimally invasive surgery may be to eliminate all abdominal incisions. The natural orifices provide a port of entry via the gastrointestinal tract to the peritoneal cavity. This approach would require the creation of a perforation, which is considered to be a major complication of endoscopy with significant morbidity and mortality. However, there are several recent studies that have described the technical feasibility and safety of a per‐oral transgastric approach to the peritoneal cavity using conventional endoscopes. Theoretically, this approach could reduce postoperative abdominal wall pain, wound infection, hernia formation, and adhesions. This article aims to summarize the current status of transgastric surgery, currently referred to as natural orifice transluminal endoscopic surgery (NOTES), and to address some of its future challenges. 相似文献