全文获取类型
收费全文 | 52631篇 |
免费 | 4409篇 |
国内免费 | 186篇 |
专业分类
耳鼻咽喉 | 413篇 |
儿科学 | 1415篇 |
妇产科学 | 1083篇 |
基础医学 | 7011篇 |
口腔科学 | 939篇 |
临床医学 | 5082篇 |
内科学 | 11241篇 |
皮肤病学 | 795篇 |
神经病学 | 5366篇 |
特种医学 | 1728篇 |
外国民族医学 | 1篇 |
外科学 | 7629篇 |
综合类 | 1064篇 |
一般理论 | 86篇 |
预防医学 | 4703篇 |
眼科学 | 1191篇 |
药学 | 3811篇 |
1篇 | |
中国医学 | 62篇 |
肿瘤学 | 3605篇 |
出版年
2023年 | 292篇 |
2022年 | 486篇 |
2021年 | 1041篇 |
2020年 | 668篇 |
2019年 | 1023篇 |
2018年 | 1164篇 |
2017年 | 867篇 |
2016年 | 908篇 |
2015年 | 1138篇 |
2014年 | 1574篇 |
2013年 | 2186篇 |
2012年 | 3161篇 |
2011年 | 3521篇 |
2010年 | 1926篇 |
2009年 | 1752篇 |
2008年 | 2976篇 |
2007年 | 3267篇 |
2006年 | 3011篇 |
2005年 | 3142篇 |
2004年 | 2903篇 |
2003年 | 2727篇 |
2002年 | 2553篇 |
2001年 | 833篇 |
2000年 | 754篇 |
1999年 | 863篇 |
1998年 | 645篇 |
1997年 | 516篇 |
1996年 | 502篇 |
1995年 | 448篇 |
1994年 | 402篇 |
1993年 | 413篇 |
1992年 | 584篇 |
1991年 | 581篇 |
1990年 | 522篇 |
1989年 | 529篇 |
1988年 | 462篇 |
1987年 | 461篇 |
1986年 | 415篇 |
1985年 | 522篇 |
1984年 | 504篇 |
1983年 | 415篇 |
1982年 | 358篇 |
1981年 | 339篇 |
1980年 | 350篇 |
1979年 | 307篇 |
1978年 | 264篇 |
1977年 | 234篇 |
1976年 | 205篇 |
1974年 | 221篇 |
1972年 | 200篇 |
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
1.
2.
Janitz Amanda E. Schraw Jeremy M. Xu Chao Lupo Philip J. 《Cancer causes & control : CCC》2022,33(3):483-488
Cancer Causes & Control - Congenital malformations are strong risk factors for childhood cancer. Our objective was to determine whether cancer survival differs by birth defect status among... 相似文献
3.
4.
5.
Philip S. Vendittelli Bassent Botros Howard S. Rosman Viren Govindaraju Anwar Zaitoun Tariq S. Marroush 《The American journal of the medical sciences》2019,357(4):333-337
Coronary embolism (CE) is an uncommon and unique cause of acute myocardial infarction. In this report, we review 216 cases of CE including 2 new cases from our institution. The mean patient age was 52.5 years and 62% of the patients were males. Chest pain was the most common presenting symptom followed by dyspnea, and the most commonly affected vessel was the left anterior descending artery. Leading etiologies of the embolus were atrial fibrillation, septic emboli, and iatrogenic causes. Treatment approaches varied with thrombus aspiration being used in 30% of cases. In-hospital mortality rate was 36% and 13% of the cases were complicated by cerebrovascular accident. CE is a unique pathology that leads to acute myocardial infarction. It portends a high mortality rate and requires a high level of suspicion as symptoms may be misleading. Further research is needed in order to improve recognition and management and to lower associated mortality. 相似文献
6.
7.
8.
9.
10.
Rohi Shah Nomaan Sheikh Jitendra Mangwani Nicolette Morgan Hamidreza Khairandish 《Journal of Clinical Orthopaedics and Trauma》2021,12(1):138
Demographic projections for hip fragility fractures indicate a rising annual incidence by virtue of a multimorbid, ageing population with more noncommunicable diseases (NCDs). NCDs are characterised by slow progression and long duration ranging from ischaemic cardiovascular disease, cerebrovascular disease, diabetes, chronic obstructive pulmonary disease to various cancers. Management of this disease burden often involves commencing patients on oral anticoagulants to reduce the risk of thromboembolic events. The use of direct oral anticoagulants (DOACs) in clinical practice has increased due to their rapid onset of action, short half-life and predictable anticoagulant effects, without the need for routine monitoring. Safe and timely surgical intervention relies on reversal of anticoagulants. However, the lack of specific evidence-based guidelines for the perioperative management of patients on DOACs with hip fractures has proved challenging; in particular, the accessibility of DOAC-specific assays, justification of the cost-benefit ratio of targeted reversal agents and indications for neuraxial anaesthesia. This has led to potentially avoidable delays in surgical intervention. Following a literature review of the pharmacokinetic and pharmacodynamics of commonly used DOACs in our region including the role of surrogate markers, we propose a systematic, evidence-based guideline to the perioperative management of hip fractures DOACs. We believe this standardised protocol can be easily replicated between hospitals. We recommend that if patients are deemed suitable for a general anaesthesia, with satisfactory renal function, optimal surgical time should be 24 h following the last ingested dose of DOAC. 相似文献