全文获取类型
收费全文 | 24879篇 |
免费 | 2423篇 |
国内免费 | 43篇 |
专业分类
耳鼻咽喉 | 231篇 |
儿科学 | 598篇 |
妇产科学 | 597篇 |
基础医学 | 3391篇 |
口腔科学 | 663篇 |
临床医学 | 2597篇 |
内科学 | 5173篇 |
皮肤病学 | 308篇 |
神经病学 | 2590篇 |
特种医学 | 1095篇 |
外国民族医学 | 1篇 |
外科学 | 3279篇 |
综合类 | 676篇 |
一般理论 | 26篇 |
预防医学 | 2300篇 |
眼科学 | 651篇 |
药学 | 1801篇 |
2篇 | |
中国医学 | 39篇 |
肿瘤学 | 1327篇 |
出版年
2021年 | 260篇 |
2020年 | 191篇 |
2019年 | 300篇 |
2018年 | 394篇 |
2017年 | 314篇 |
2016年 | 304篇 |
2015年 | 367篇 |
2014年 | 522篇 |
2013年 | 912篇 |
2012年 | 1181篇 |
2011年 | 1281篇 |
2010年 | 652篇 |
2009年 | 646篇 |
2008年 | 1175篇 |
2007年 | 1246篇 |
2006年 | 1292篇 |
2005年 | 1302篇 |
2004年 | 1274篇 |
2003年 | 1183篇 |
2002年 | 1203篇 |
2001年 | 560篇 |
2000年 | 532篇 |
1999年 | 501篇 |
1998年 | 274篇 |
1997年 | 211篇 |
1996年 | 213篇 |
1995年 | 260篇 |
1994年 | 239篇 |
1993年 | 222篇 |
1992年 | 425篇 |
1991年 | 488篇 |
1990年 | 452篇 |
1989年 | 379篇 |
1988年 | 424篇 |
1987年 | 372篇 |
1986年 | 373篇 |
1985年 | 378篇 |
1984年 | 338篇 |
1983年 | 264篇 |
1982年 | 216篇 |
1981年 | 233篇 |
1980年 | 214篇 |
1979年 | 291篇 |
1978年 | 232篇 |
1977年 | 221篇 |
1976年 | 196篇 |
1975年 | 205篇 |
1974年 | 232篇 |
1973年 | 181篇 |
1972年 | 200篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Derek K. Chu Romina Brignardello-Petersen Gordon H. Guyatt Cristian Ricci Jon Genuneit 《Pediatric allergy and immunology》2022,33(1):e13609
Network meta-analyses (NMAs) simultaneously estimate the effects of multiple possible treatment options for a given clinical presentation. For allergists to benefit optimally from NMAs, they must understand the process and be able to interpret the results. Through a worked example published in Pediatric Allergy and Immunology, we summarize how to identify credible NMAs and interpret them with a focus on recent innovations in the GRADE approach (Grading of Recommendations Assessment, Development, and Evaluation). NMAs build on traditional systematic reviews and meta-analyses that consider only direct paired comparisons by including indirect evidence, thus allowing the simultaneous assessment of the relative effect of all pairs of competing alternatives. Our framework informs clinicians of how to identify credible NMAs and address the certainty of the evidence. Trustworthy NMAs fill a critical gap in providing key inferences using direct and indirect evidence to inform clinical decision making when faced with more than two competing courses of treatment options. This document will help allergists to identify trustworthy NMAs to enhance patient care. 相似文献
2.
3.
Schaefer Jordan K. Barnes Geoffrey D. Sussman Jeremy B. Saini Sameer D. Caverly Tanner J. Read Susan Zikmund-Fisher Brian J. Kurlander Jacob E. 《Journal of thrombosis and thrombolysis》2022,54(4):639-646
Journal of Thrombosis and Thrombolysis - Recent trials suggest that aspirin for primary prevention may do more harm than good for some, including adults over 70 years of age. We sought to... 相似文献
4.
5.
Gordon K. B. Saburov V. O. Koryakin S. N. Gulidov I. A. Fatkhudinov T. Kh. Arutyunyan I. V. Kaprin A. D. Solov’ev A. N. 《Bulletin of experimental biology and medicine》2022,173(2):281-285
Bulletin of Experimental Biology and Medicine - Fast neutron therapy, which previously has demonstrated effective results, but along with a large number of complications, can again be considered a... 相似文献
6.
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7.
8.
Background
In 2011, Israel instituted financial incentives as part of a larger program to attract doctors to residency programs in peripheral hospitals.Objective
To explore the impact of these incentives and related changes on the choices of locations for residency training in Israel.Methods
We performed (A) an analysis of administrative data on the location of all new medical residencies in 2005–2014 (B) an internet/phone survey of residents who began specialty training in 2013–2014, with a response rate of 71%.Results
(A) Of all entrants to residency training programs in Israel, those in peripheral hospitals constituted 16–20% in 2005–2010, 19% in 2011, 23% in 2012, and 23% in 2013; the increase consisted predominantly of physicians who were graduates of non-Israeli medical schools (B) About half of all residents in the periphery reported that the incentives contributed to their choice of residency location. About 40% of that group also reported that they had planned already in medical school to practice in the periphery, while 60% of that group (30% of all residents in the periphery) did not have such plans prior to medical school. About 70% of the residents in peripheral hospitals grew up in the periphery; for the southern periphery this was 40% and for the northern periphery this was 80%.Conclusions
The changes instituted in 2011 apparently affected residency location preferences for a non-negligible proportion of young physicians, particularly among those who grew up in the periphery. Policymakers should consider combining targeted incentives with measures to increase the supply of physicians who grew up in the periphery. 相似文献9.