全文获取类型
收费全文 | 1720篇 |
免费 | 66篇 |
国内免费 | 3篇 |
专业分类
耳鼻咽喉 | 10篇 |
儿科学 | 53篇 |
妇产科学 | 38篇 |
基础医学 | 116篇 |
口腔科学 | 58篇 |
临床医学 | 386篇 |
内科学 | 523篇 |
皮肤病学 | 51篇 |
神经病学 | 45篇 |
特种医学 | 10篇 |
外科学 | 146篇 |
综合类 | 29篇 |
一般理论 | 18篇 |
预防医学 | 120篇 |
眼科学 | 19篇 |
药学 | 142篇 |
中国医学 | 3篇 |
肿瘤学 | 22篇 |
出版年
2017年 | 18篇 |
2016年 | 21篇 |
2015年 | 26篇 |
2014年 | 32篇 |
2013年 | 44篇 |
2012年 | 11篇 |
2010年 | 51篇 |
2009年 | 62篇 |
2008年 | 12篇 |
2007年 | 12篇 |
2006年 | 18篇 |
2005年 | 11篇 |
2003年 | 12篇 |
2001年 | 24篇 |
2000年 | 14篇 |
1999年 | 44篇 |
1998年 | 60篇 |
1997年 | 91篇 |
1996年 | 94篇 |
1995年 | 59篇 |
1994年 | 58篇 |
1993年 | 64篇 |
1992年 | 51篇 |
1991年 | 55篇 |
1990年 | 49篇 |
1989年 | 56篇 |
1988年 | 53篇 |
1987年 | 40篇 |
1986年 | 32篇 |
1985年 | 30篇 |
1984年 | 41篇 |
1983年 | 38篇 |
1982年 | 26篇 |
1981年 | 34篇 |
1980年 | 23篇 |
1979年 | 17篇 |
1978年 | 16篇 |
1977年 | 18篇 |
1976年 | 13篇 |
1975年 | 11篇 |
1971年 | 20篇 |
1968年 | 11篇 |
1959年 | 19篇 |
1958年 | 30篇 |
1957年 | 26篇 |
1956年 | 38篇 |
1955年 | 30篇 |
1954年 | 26篇 |
1949年 | 10篇 |
1948年 | 12篇 |
排序方式: 共有1789条查询结果,搜索用时 0 毫秒
11.
12.
13.
PAUL J. GRUENEWALD 《Addiction (Abingdon, England)》2006,101(3):459-460
14.
15.
16.
17.
PAUL O'FLYNN 《Clinical otolaryngology》1993,18(5):423-425
Acoustic rhinometry measures nasal cavity geometry by analysis of reflected acoustic impulses. Previously, the technique has been applied to normals, patients with septal deviations and rhinitis and to monitor the medical treatment of nasal polyps. To date, no study has been published to validate the application of this technique where nasal polyps are present. In this study, acoustic rhinometry has been used to assess the change in nasal cavity volume following intra-nasal polypectomy in 20 subjects. The volumes of the polyps removed surgically were measured by displacement and compared with the volume change recorded by acoustic rhinometry. A correlation of r = 0.59 (P= <0.01) has been obtained. Therefore, it is possible to apply acoustic rhinometry as a method of assessing non-surgical treatment of nasal polyps given certain conditions. 相似文献
18.
19.
20.
J. DAVID TALLEY M.D. FAYAZ SHAWL M.D. AUGUSTO PICHARD M.D. ALLESANDRO GIAMBARTOLOMEI M.D. PAUL OVERLIE M.D. ROBERT SIEGEL M.D. JOEL ROSENBERG M.D. CHRISTOPHER U. CATES M.D. FRANK CUMMINS M.D. EDWARD KOSINSKI M.D. 《Journal of interventional cardiology》1997,10(4):295-299
Lesions in the distal portion of coronary arteries are technological challenges with currently available percutaneous transluminal coronary angioplasty (PTCA) equipment. A study was performed at multiple centers to determine if new "fixed-wire" devices with a modified distal tip (a 2-cm flexible tip and 1-cm standard tip) would be useful in these situations. Three hundred twenty-three patients were included in the study, 75% male, mean age 63 ± 11 years. Four hundred ninety-three lesions were attempted; the overall success rate was 85%. Forty-six (14.2%) clinical complications occurred including: 5 deaths (1.1%); 2 nonfatal myocardial infarctions (0.6%); and 6 emergency coronary artery bypass grafting procedures (2.6%). A device malfunction was noted in 32 patients (9.9%), and included: 8 balloon ruptures or perforations (2.0%); 6 bent or damaged tips (1.9%); and 4 shaft/manifold leaks (1.2%). Two-month follow-up assessment for restenosis was done in 352 of 371 (95%) patients and at that time 89% were asymptomatic, had a negative functional test, or patent PTCA site by angiography. The new fixed-wire PTCA catheters with 1- and 2-cm flexible tips hold promise for dilating lesions in distal locations with an acceptable rate of complications. Additional investigation is needed to determine their role in the treatment of coronary artery disease with PTCA. 相似文献