全文获取类型
收费全文 | 262035篇 |
免费 | 18898篇 |
国内免费 | 1141篇 |
专业分类
耳鼻咽喉 | 2915篇 |
儿科学 | 6898篇 |
妇产科学 | 4870篇 |
基础医学 | 34422篇 |
口腔科学 | 4766篇 |
临床医学 | 26347篇 |
内科学 | 55303篇 |
皮肤病学 | 3494篇 |
神经病学 | 25421篇 |
特种医学 | 8825篇 |
外国民族医学 | 11篇 |
外科学 | 39708篇 |
综合类 | 3761篇 |
一般理论 | 347篇 |
预防医学 | 22369篇 |
眼科学 | 6767篇 |
药学 | 17745篇 |
6篇 | |
中国医学 | 365篇 |
肿瘤学 | 17734篇 |
出版年
2023年 | 1360篇 |
2022年 | 2451篇 |
2021年 | 5521篇 |
2020年 | 3344篇 |
2019年 | 5413篇 |
2018年 | 6072篇 |
2017年 | 4590篇 |
2016年 | 5066篇 |
2015年 | 5950篇 |
2014年 | 8780篇 |
2013年 | 12093篇 |
2012年 | 18364篇 |
2011年 | 19251篇 |
2010年 | 10782篇 |
2009年 | 9615篇 |
2008年 | 16949篇 |
2007年 | 17821篇 |
2006年 | 17686篇 |
2005年 | 17634篇 |
2004年 | 16562篇 |
2003年 | 15394篇 |
2002年 | 14427篇 |
2001年 | 2488篇 |
2000年 | 1984篇 |
1999年 | 2648篇 |
1998年 | 3196篇 |
1997年 | 2659篇 |
1996年 | 2326篇 |
1995年 | 2201篇 |
1994年 | 1851篇 |
1993年 | 1699篇 |
1992年 | 1545篇 |
1991年 | 1450篇 |
1990年 | 1281篇 |
1989年 | 1254篇 |
1988年 | 1207篇 |
1987年 | 1207篇 |
1986年 | 1191篇 |
1985年 | 1184篇 |
1984年 | 1399篇 |
1983年 | 1316篇 |
1982年 | 1477篇 |
1981年 | 1405篇 |
1980年 | 1220篇 |
1979年 | 879篇 |
1978年 | 865篇 |
1977年 | 725篇 |
1976年 | 685篇 |
1975年 | 549篇 |
1974年 | 562篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
91.
92.
93.
Eric T. Stoopler DMD res Pinto DMD Faizan Alawi DDS Sree Raghavendra DMD Ricardo Boyce Jr. DDS David Porter MD Thomas P. Sollecito DMD 《Special care in dentistry》2004,24(2):65-69
Acute myelogenous leukemia (AMU is a hematologic disorder that is characterized by an abnormal proliferation of immature myeloid cells. Granulocytic sarcomas are clusters of leukemic myeloid cells that may develop as a result of AML. Oral manifestations of AML are common and often involve enlargements of the gingiva and/or mucosal tissue from direct leukemia cell infiltration. We describe the case history of a 50-year-old man who had an ulcera-tive lesion of the oral mucosa that was determined to be a granulocytic sarcoma of AML-M0 subtype. The combination of both the subtype and clinical presentation of the leukemia makes this presentation unusual, and to the best of our knowledge, of a type that has not been previously reported in the literature. 相似文献
94.
Michael T Fitch David E Manthey Henderson D McGinnis Bret A Nicks Manoj Pariyadath 《BMC medical education》2008,8(1):38
Background
Skin and soft tissue infections are increasingly prevalent clinical problems, and it is important for health care practitioners to be well trained in how to treat skin abscesses. A realistic model of abscess incision and drainage will allow trainees to learn and practice this basic physician procedure. 相似文献95.
Infections caused by extended-spectrum beta-lactamase (ESBL)-producing pathogens, particularly Klebsiella pneumoniae, are increasing. The epidemiology of ESBL-producing K. pneumoniae, the mechanisms of resistance, and treatment strategies for infections caused by these organisms are reviewed. 相似文献
96.
David C Hatcher Cameron L Aboudara 《American journal of orthodontics and dentofacial orthopedics》2004,125(4):512-515
Accurate images of the craniofacial region are critical for the development of an orthodontic diagnosis and treatment plan. The NewTom QR 9000 Volume Scanner (QR s.r.l., Verona, Italy) represents a significant advance in imaging capabilities for dentistry and orthodontics. This new-generation scanner uses computed tomography technology to provide a complete 3D view of the maxilla and mandible with relatively high resolution and low radiation exposure to patients. This article discusses some technical aspects of this new scanner and its possible orthodontic uses. 相似文献
97.
David Jiménez Castro Gema Díaz David Martí Carlos Escobar Javier Ortega Sergio García-Rull Joaquin Picher Antonio Sueiro 《Blood coagulation & fibrinolysis》2007,18(2):173-177
This study aimed to determine whether a weight-adjusted dose of subcutaneous enoxaparin is as effective and safe as oral acenocoumarol for the secondary prophylaxis of pulmonary embolism. Three hundred and eighty consecutive noncancer outpatients hospitalized with an episode of symptomatic pulmonary embolism selected treatment with acenocoumarol or enoxaparin at a dose of 1 mg/kg once daily after being informed of the type of administration and expected frequency of laboratory monitoring for both medicinal products. Endpoints were symptomatic recurrent thromboembolic events evaluated by standard objective testing, and a composite endpoint of recurrent venous thromboembolism, major bleeding, and death from any cause. One hundred and ninety-nine patients (52%) chose acenocoumarol therapy and 181 chose enoxaparin monotherapy. Four patients in the enoxaparin group (2.2%) and six patients in the acenocoumarol group (3%) had an objective thromboembolic recurrence (hazard ratio, 1.35; 95% confidence interval, 0.38-4.79; P = 0.64). Nine patients in the enoxaparin group (5.0%) had a hemorrhagic complication compared with 11 in the acenocoumarol group (5.5%) (P = 0.81). The hospital length of stay was shorter with enoxaparin compared with acenocoumarol (11 versus 16 days, P = 0.0001). Enoxaparin is as effective and safe as acenocoumarol in the secondary prevention of recurrent thromboembolic disease and is associated with shorter hospitalization. 相似文献
98.
99.
To date, the main respiratory health consequence from the collapse of the World Trade Center (WTC) on September 11, 2001 has been the “WTC Cough Syndrome” (chronic rhinosinusitis, asthma, and/or bronchitis, often complicated by gastroesophageal reflux dysfunction). Syndrome incidence and severity have been linked to WTC dust exposure intensity. While it is too early to ascertain long-term effects of WTC dust exposure, effective treatment guidelines have been designed through a collaborative effort by the three established centers of excellence for WTC medical monitoring and treatment and the WTC Registry. These treatment recommendations are described here.
相似文献100.
Building small things for small patients is tough, and sometimesexpensive, but it really needs to be done. I was pleased tosee the paper by Thierry Scohy et al., the Rotterdam PediatricCardiology, Anesthesiology and Surgery group, in a paper publishedin this issue of the European Journal of Echocardiography, asuitable venue for this report, since so much of the developmentof this device has been European. In this paper, the group reportstheir experience using a micromultiplane transesophageal probe 相似文献