全文获取类型
收费全文 | 168288篇 |
免费 | 33494篇 |
国内免费 | 2448篇 |
专业分类
耳鼻咽喉 | 5456篇 |
儿科学 | 6486篇 |
妇产科学 | 2887篇 |
基础医学 | 4802篇 |
口腔科学 | 1829篇 |
临床医学 | 28022篇 |
内科学 | 51591篇 |
皮肤病学 | 7722篇 |
神经病学 | 15656篇 |
特种医学 | 7030篇 |
外科学 | 44278篇 |
综合类 | 694篇 |
现状与发展 | 72篇 |
一般理论 | 3篇 |
预防医学 | 8013篇 |
眼科学 | 4240篇 |
药学 | 2490篇 |
1篇 | |
中国医学 | 82篇 |
肿瘤学 | 12876篇 |
出版年
2024年 | 518篇 |
2023年 | 4889篇 |
2022年 | 1429篇 |
2021年 | 3811篇 |
2020年 | 6383篇 |
2019年 | 2747篇 |
2018年 | 8043篇 |
2017年 | 7773篇 |
2016年 | 8837篇 |
2015年 | 8846篇 |
2014年 | 16192篇 |
2013年 | 16491篇 |
2012年 | 6885篇 |
2011年 | 6745篇 |
2010年 | 11107篇 |
2009年 | 14777篇 |
2008年 | 6708篇 |
2007年 | 4964篇 |
2006年 | 7333篇 |
2005年 | 4555篇 |
2004年 | 3747篇 |
2003年 | 2600篇 |
2002年 | 2612篇 |
2001年 | 4243篇 |
2000年 | 3482篇 |
1999年 | 3596篇 |
1998年 | 3788篇 |
1997年 | 3581篇 |
1996年 | 3468篇 |
1995年 | 3312篇 |
1994年 | 2035篇 |
1993年 | 1636篇 |
1992年 | 1645篇 |
1991年 | 1649篇 |
1990年 | 1266篇 |
1989年 | 1379篇 |
1988年 | 1180篇 |
1987年 | 1022篇 |
1986年 | 1034篇 |
1985年 | 877篇 |
1984年 | 688篇 |
1983年 | 657篇 |
1982年 | 574篇 |
1981年 | 472篇 |
1980年 | 418篇 |
1979年 | 421篇 |
1978年 | 414篇 |
1977年 | 459篇 |
1973年 | 339篇 |
1972年 | 402篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
32.
33.
34.
Jamaal L. Benjamin MD PhD Rebecca Dennis DO Stacy White Jr MD David Munson MD Sudha A. Anupindi MD Maciej Piskunowicz MD Kassa Darge MD PhD Ami Gokli MD Misun Hwang MD 《Journal of ultrasound in medicine》2020,39(5):1031-1036
Bowel diseases of prematurity, including necrotizing enterocolitis, are dreaded ailments of neonates. Early diagnosis is difficult, with clinical and radiographic findings often inconclusive. We present a novel use of contrast-enhanced ultrasound in detection of pediatric bowel disease. Early identification of compromised blood flow or an at-risk bowel can be quantitatively detected and monitored. This ability has implications for guidance of emerging therapies, allowing targeting of inflammation. These findings represent an advancement in detection of bowel disease in neonates. 相似文献
35.
Maaike van Gerwen MD Naomi Alpert MS Raja Flores MD Emanuela Taioli MD PhD 《American journal of industrial medicine》2020,63(2):115-120
The association between asbestos exposure, mainly in occupational settings, and malignant mesothelioma has been well established; this has prompted several countries to establish mesothelioma epidemiologic surveillance programs often at the request of national agencies. This review compares currently existing mesothelioma registries worldwide to develop a concept model for a US real-time case capture mesothelioma registry. Five countries were identified with a mesothelioma specific registry, including Italy, France, UK, Australia, and South Korea. All, except the UK, used interviews to collect exposure data. Linkage with the national death index was available or was in future plans for all registries. The registries have limited information on treatment, quality of life, and other patient-centered outcomes such as symptoms and pain management. To thoroughly collect exposure data, “real-time” enrollment is preferable; to maximize the capture of mesothelioma cases, optimal coverage, and a simplified consent process are needed. 相似文献
36.
37.
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
38.
39.
40.