全文获取类型
收费全文 | 3530541篇 |
免费 | 295147篇 |
国内免费 | 14167篇 |
专业分类
耳鼻咽喉 | 47900篇 |
儿科学 | 112577篇 |
妇产科学 | 92342篇 |
基础医学 | 561137篇 |
口腔科学 | 93796篇 |
临床医学 | 317245篇 |
内科学 | 629468篇 |
皮肤病学 | 93289篇 |
神经病学 | 303814篇 |
特种医学 | 137854篇 |
外国民族医学 | 490篇 |
外科学 | 541123篇 |
综合类 | 107629篇 |
现状与发展 | 24篇 |
一般理论 | 2337篇 |
预防医学 | 297076篇 |
眼科学 | 80600篇 |
药学 | 241606篇 |
22篇 | |
中国医学 | 10472篇 |
肿瘤学 | 169054篇 |
出版年
2021年 | 55163篇 |
2020年 | 35130篇 |
2019年 | 58151篇 |
2018年 | 71610篇 |
2017年 | 54712篇 |
2016年 | 60482篇 |
2015年 | 74344篇 |
2014年 | 108572篇 |
2013年 | 173663篇 |
2012年 | 98894篇 |
2011年 | 99383篇 |
2010年 | 117842篇 |
2009年 | 122238篇 |
2008年 | 86192篇 |
2007年 | 89811篇 |
2006年 | 100275篇 |
2005年 | 95558篇 |
2004年 | 96988篇 |
2003年 | 87427篇 |
2002年 | 76894篇 |
2001年 | 118112篇 |
2000年 | 111567篇 |
1999年 | 107513篇 |
1998年 | 66639篇 |
1997年 | 64233篇 |
1996年 | 62074篇 |
1995年 | 57522篇 |
1994年 | 51464篇 |
1993年 | 48034篇 |
1992年 | 74192篇 |
1991年 | 69865篇 |
1990年 | 65608篇 |
1989年 | 64402篇 |
1988年 | 59365篇 |
1987年 | 58076篇 |
1986年 | 54615篇 |
1985年 | 54413篇 |
1984年 | 49486篇 |
1983年 | 45057篇 |
1982年 | 42165篇 |
1981年 | 39542篇 |
1980年 | 37232篇 |
1979年 | 40221篇 |
1978年 | 35565篇 |
1977年 | 32274篇 |
1976年 | 29611篇 |
1975年 | 27937篇 |
1974年 | 29005篇 |
1973年 | 28026篇 |
1972年 | 26228篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
Eric S. Zhou Larissa Nekhlyudov Sharon L. Bober 《Translational andrology and urology》2015,4(2):218-231
There is a large and growing population of long-term cancer survivors. Primary care physicians (PCPs) are playing an increasingly greater role in the care of these patients across the continuum of cancer survivorship. In this role, PCPs are faced with the responsibility of managing a range of medical and psychosocial late effects of cancer treatment. In particular, the sexual side effects of treatment which are common and have significant impact on quality of life for the cancer survivor, often go unaddressed. This is an area of clinical care and research that has received increasing attention, highlighted by the presentation of this special issue on Cancer and Sexual Health. The aims of this review are 3-fold. First, we seek to overview common presentations of sexual dysfunction related to major cancer diagnoses in order to give the PCP a sense of the medical issues that the survivor may present with. Barriers to communication about sexual health issues between patient/PCPs in order are also described in order to emphasize the importance of PCPs initiating this important conversation. Next, we provide strategies and resources to help guide the PCP in the management of sexual dysfunction in cancer survivors. Finally, we discuss case examples of survivorship sexual health issues and highlight the role that a PCP can play in each of these case examples. 相似文献
42.
Stelter K. Theodoraki M. N. Becker S. Tsekmistrenko V. Olzowy B. Ledderose G. 《European archives of oto-rhino-laryngology》2015,272(3):639-639
European Archives of Oto-Rhino-Laryngology - 相似文献
43.
Haya Mohammed BSc MChB M. Yousuf Salmasi MRCS Massimo Caputo PhD Gianni D. Angelini PhD Hunaid A. Vohra PhD 《Journal of cardiac surgery》2020,35(6):1209-1219
Background
Limited data exists demonstrating the efficacy of minimally invasive surgery (MIS) compared to median sternotomy (MS) for multiple valvular disease (MVD). This systematic review and meta-analysis aims to compare operative and peri-operative outcomes of MIS vs MS in MVD.Methods
PubMed, Ovid, and Embase were searched from inception until August 2019 for randomized and observational studies comparing MIS and MS in patients with MVD. Clinical outcomes of intra- and postoperative times, reoperation for bleeding and surgical site infection were evaluated.Results
Five observational studies comparing 340 MIS vs 414 MS patients were eligible for qualitative and quantitative review. The quality of evidence assessed using the Newcastle-Ottawa scale was good for all included studies. Meta-analysis demonstrated increased cardiopulmonary bypass time for MIS patients (weighted mean difference [WMD], 0.487; 95% confidence interval [CI], 0.365-0.608; P < .0001). Similarly, aortic cross-clamp time was longer in patients undergoing MIS (WMD, 0.632; 95% CI, 0.509-0.755; P < .0001). No differences were found in operative mortality, reoperation for bleeding, surgical site infection, or hospital stay.Conclusions
MIS for MVD have similar short-term outcomes compared to MS. This adds value to the use of minimally invasive methods for multivalvular surgery, despite conferring longer operative times. However, the paucity in literature and learning curve associated with MIS warrants further evidence, ideally randomized control trials, to support these findings.44.
Sathiyavelavan Gopalan Jagadesh Chandra Bose S. Periasamy 《The Indian journal of surgery》2015,77(3):232-236
The aim of this study is to review the literature to find out the exact etiology of anastomotic cancers of colon post resection and differentiate them between a recurrence, second primary, and metastatic disease (local manifestation of systemic disease). Web-based literature search was done, and datas collected. We searched PubMed for papers using the keywords colon cancer recurrence, anastomotic recurrence, and recurrent colon carcinoma. We also searched for systematic review in the same topic. In addition, we used our personal referrence archive. Anastomotic recurrences of colon are postulated to arise due to inadequate margins, tumor implantation by exfoliated cells, altered biological properties of bowel anastomosis, and missed synchronous lesions. Some tumors are unique with repeated recurrence after repeated resection. Duration after primary surgery plays a major role in differentiating recurrent and second primary lesions. Repeated recurrences after repeated resections have to be considered a manifestation of systemic disease or metastatic disease due to the virulence of the disease. A detailed analysis and study of patients with colonic anastomotic lesion are required to differentiate it between a recurrent, a second primary lesion, and a metastatic disease (local manifestation of a systemic disease). The nomenclature is significant to study the survival of these patients, as a second primary lesion will have different survival compared to that of recurrent lesions. 相似文献
45.
Michael E Egger Joanna M Ohlendorf Charles R Scoggins Kelly M McMasters Robert C G Martin II 《HPB : the official journal of the International Hepato Pancreato Biliary Association》2015,17(9):839-845
BackgroundThe aim of this paper is to assess the current state of quality and outcomes measures being reported for hepatic resections in the recent literature.MethodsMedline and PubMed databases were searched for English language articles published between 1 January 2002 and 30 April 2013. Two examiners reviewed each article and relevant citations for appropriateness of inclusion, which excluded papers of liver donor hepatic resections, repeat hepatectomies or meta-analyses. Data were extracted and summarized by two examiners for analysis.ResultsFifty-five studies were identified with suitable reporting to assess peri-operative mortality in hepatic resections. In only 35% (19/55) of the studies was the follow-up time explicitly stated, and in 47% (26/55) of studies peri-operative mortality was limited to in-hospital or 30 days. The time period in which complications were captured was not explicitly stated in 19 out of 28 studies. The remaining studies only captured complications within 30 days of the index operation (8/28). There was a paucity of quality literature addressing truly patient-centred outcomes.ConclusionQuality outcomes after a hepatic resection are inconsistently reported in the literature. Quality outcome studies for a hepatectomy should report mortality and morbidity at a minimum of 90 days after surgery. 相似文献
46.
47.
48.
Andrea Stracciolini Jennifer Luz Gregory Walker Nicholas M. Edwards Avery D. Faigenbaum Gregory D. Myer 《The Physician and sportsmedicine》2020,48(2):199-207
ABSTRACT
Objective
To investigate primary care physician clinical practice patterns, barriers, and education surrounding pediatric physical activity (PA), and to compare practice patterns by discipline. 相似文献49.