全文获取类型
收费全文 | 10626篇 |
免费 | 828篇 |
国内免费 | 25篇 |
专业分类
耳鼻咽喉 | 123篇 |
儿科学 | 252篇 |
妇产科学 | 259篇 |
基础医学 | 1324篇 |
口腔科学 | 153篇 |
临床医学 | 1241篇 |
内科学 | 2458篇 |
皮肤病学 | 132篇 |
神经病学 | 1145篇 |
特种医学 | 536篇 |
外科学 | 1461篇 |
综合类 | 144篇 |
现状与发展 | 1篇 |
一般理论 | 29篇 |
预防医学 | 893篇 |
眼科学 | 171篇 |
药学 | 610篇 |
中国医学 | 37篇 |
肿瘤学 | 510篇 |
出版年
2022年 | 63篇 |
2021年 | 170篇 |
2020年 | 100篇 |
2019年 | 148篇 |
2018年 | 194篇 |
2017年 | 149篇 |
2016年 | 152篇 |
2015年 | 185篇 |
2014年 | 245篇 |
2013年 | 423篇 |
2012年 | 609篇 |
2011年 | 606篇 |
2010年 | 338篇 |
2009年 | 340篇 |
2008年 | 536篇 |
2007年 | 629篇 |
2006年 | 631篇 |
2005年 | 606篇 |
2004年 | 539篇 |
2003年 | 520篇 |
2002年 | 542篇 |
2001年 | 214篇 |
2000年 | 211篇 |
1999年 | 209篇 |
1998年 | 132篇 |
1997年 | 121篇 |
1996年 | 125篇 |
1995年 | 96篇 |
1994年 | 84篇 |
1993年 | 98篇 |
1992年 | 167篇 |
1991年 | 165篇 |
1990年 | 135篇 |
1989年 | 117篇 |
1988年 | 115篇 |
1987年 | 107篇 |
1986年 | 130篇 |
1985年 | 119篇 |
1984年 | 104篇 |
1983年 | 100篇 |
1982年 | 107篇 |
1981年 | 116篇 |
1980年 | 86篇 |
1979年 | 73篇 |
1978年 | 71篇 |
1977年 | 70篇 |
1976年 | 57篇 |
1975年 | 46篇 |
1973年 | 44篇 |
1972年 | 52篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
Aoife De Brún Liran Shan Áine Regan Áine McConnon Patrick Wall 《Health communication》2016,31(10):1235-1241
The 2008 dioxin crisis occurred as a result of contamination of Irish pork. The event had significant implications for Ireland’s economy and the reputation of its agricultural industry, as well as raising concerns for human health. This study describes the results of a content analysis of Irish and UK newspaper coverage of the 2008 Irish dioxin crisis, as this is likely to provide insight into how public perceptions of this issue were shaped. Articles from 16 print publications were systematically sampled for the period December 2008 to February 2009. The resulting data set of 141 articles was examined using a coding protocol developed based on previous research and refined during piloting. Results indicated that the dioxin crisis was primarily portrayed by the media as an industry/economic crisis, dominant in 26.9% of articles in the sample. Within this dominant portrayal, the agricultural industry was frequently cited as being in crisis (42.6%); however, the implications of the crisis on the wider economic environment also received attention (17.7%). Differences between Irish and UK-based media were also examined, revealing that while the Irish media most frequently described the crisis in terms of its impact on the industry and economy, the UK media were more likely to portray the crisis as a risk to health. These dominant media messages and message framings have implications for the public understanding of the issue in each country and potential consequences regarding perception of the adequacy of existing food policy and regulatory oversight. 相似文献
4.
Jerome Marley Julia Taylor Jane Brocksom Kath Schubach Andrea Nixon Paula Allchorne Susanne Vahr Lauridsen 《International Journal of Urological Nursing》2020,14(1):5-12
A series of three World Café events centred on the topic of developing an Educational Framework for Urological Nursing [EFUN] were held by the British Association of Urological Nurses [BAUN], the European Association of Urology Nurses [EAUN] and the Australian and New Zealand Urological Nursing Society [ANZUNS] between 2017 and 2019. About 376 urology nurses participated in these “conversations that matter” and generated 1047 individual response items that were grouped into themes to assist the three associations to take the creation of an EFUN to the next level. Areas explored centred on four aspects: what any agreed educational framework for urology nursing should contain; the academic level at which education should be provided; who should be recruited as collaborators on writing an educational framework and, lastly, just how any emergent framework should be used. Analysis of the conversational data indicate that there exists within the urological nursing community a collective wisdom regarding their educational needs and how these needs should be met. 相似文献
5.
6.
7.
Ayad Al Darrab Jerome Fan Christopher M B Fernandes Rosanne Zimmerman Rhonda Smith Andrew Worster Teresa Smith Kelly O'Connor 《European journal of emergency medicine》2006,13(1):32-35
STUDY OBJECTIVES: Use of fast track has been shown to improve the emergency department flow of less urgent patients. It has been speculated, however, that this could negatively affect the care of urgent patients. The objective of this study was to determine whether a dedicated fast track for less urgent patients [Canadian Triage and Acuity scale category 4/5 (CTAS 4/5)] affected (1) the time to assessment for urgent patients (CTAS 3), (2) the length of stay for less urgent patients (CTAS 4 and 5), and (3) the left-without-being-seen rate. METHODS: In June 2003, fast track was opened in our emergency department from 13:00 to 19:00 h. A before-after intervention comparison analysis was completed for 1 week in Aug 2002 and the same week in Aug 2003. Data collected included (1) time to assessment of CTAS 3 patients, (2) the length of stay for CTAS 4/5 patients, and (3) percentage of patients who left without being seen. RESULTS: A total of 368 patients were reviewed for 2002 and 380 patients were reviewed for 2003. Median time to assessment of CTAS 3 patients presenting from 13:00 to 19:00 h was reduced from 66 min (Interquartile range: 40, 94 min) in 2002 to 60 min (IQR: 38, 108 min) after fast track was open in 2003 (P = 0.95). Median length of stay of CTAS 4 and 5 patients was reduced from 170 min (IQR: 111, 256 min) to 110 min (IQR: 69, 185 min) (P < 0.001). The overall left-without-being-seen rate decreased from 5% (20/368) to 2% (9/380). CONCLUSION: A dedicated fast track for CTAS 4/5 patients can reduce the length of stay and the left-without-being-seen rate with no impact on CTAS 3 patients seen in the main emergency department. 相似文献
8.
9.
Sixty-three mallards were fed one of ten poly(methyl methacrylate) based synthetic grit formulations containing varying concentrations of a proposed wildlife contraceptive (nicarbazin), plasticizer (acetyl tributylcitrate) and/or cross-linking agent (1,4-butanediol diacrylate). Release characteristics of the contraceptive agent were monitored for the purpose of developing a contraceptive formulation for control of pest waterfowl in urban settings. The addition of plasticizer increased the erosion rate (t(1/2)=0.97-2.85 days), cross-linking the polymer matrix slightly decreased the erosion rate (t(1/2)=4.45-5.05 days) and increasing the concentration of the contraceptive agent increased the erosion rate (t(1/2)=3.3 and 9.9 days at 60% and 7.5% active ingredient, respectively). The larger and smaller grit pieces had longer half lives at 11.0 and 11.6 days, respectively while the mid sized grit had a half life of 4.95 days. Control grit had a half life of 12.7 days based on weight loss. Analysis of blood and feces for monitoring release from the grit and approximate indirect plasma levels of the active ingredient proved feasible. 相似文献
10.