全文获取类型
收费全文 | 885篇 |
免费 | 73篇 |
国内免费 | 1篇 |
专业分类
耳鼻咽喉 | 4篇 |
儿科学 | 73篇 |
妇产科学 | 15篇 |
基础医学 | 120篇 |
口腔科学 | 19篇 |
临床医学 | 101篇 |
内科学 | 205篇 |
皮肤病学 | 20篇 |
神经病学 | 127篇 |
特种医学 | 103篇 |
外科学 | 59篇 |
综合类 | 10篇 |
预防医学 | 29篇 |
眼科学 | 1篇 |
药学 | 27篇 |
中国医学 | 2篇 |
肿瘤学 | 44篇 |
出版年
2023年 | 9篇 |
2022年 | 8篇 |
2021年 | 14篇 |
2020年 | 5篇 |
2019年 | 12篇 |
2018年 | 10篇 |
2017年 | 18篇 |
2016年 | 17篇 |
2015年 | 29篇 |
2014年 | 25篇 |
2013年 | 41篇 |
2012年 | 33篇 |
2011年 | 39篇 |
2010年 | 37篇 |
2009年 | 30篇 |
2008年 | 32篇 |
2007年 | 33篇 |
2006年 | 34篇 |
2005年 | 26篇 |
2004年 | 18篇 |
2003年 | 17篇 |
2002年 | 24篇 |
2001年 | 20篇 |
2000年 | 19篇 |
1999年 | 21篇 |
1998年 | 22篇 |
1997年 | 34篇 |
1996年 | 28篇 |
1995年 | 32篇 |
1994年 | 26篇 |
1993年 | 39篇 |
1992年 | 10篇 |
1991年 | 11篇 |
1990年 | 24篇 |
1989年 | 20篇 |
1988年 | 25篇 |
1987年 | 13篇 |
1986年 | 14篇 |
1985年 | 16篇 |
1984年 | 4篇 |
1983年 | 6篇 |
1982年 | 6篇 |
1981年 | 15篇 |
1980年 | 8篇 |
1979年 | 2篇 |
1978年 | 5篇 |
1977年 | 7篇 |
1976年 | 12篇 |
1975年 | 5篇 |
1957年 | 1篇 |
排序方式: 共有959条查询结果,搜索用时 484 毫秒
61.
62.
In an infant with Menkes's steely-hair syndrome, early treatment (from 21 days of age) with parenteral copper failed to halt the disease. In addition to urinary tract abnormalities, panlobular emphysema was present a finding not previously noted in the syndrome. 相似文献
63.
A history of pet contact and/or apparent clinical sensitivity was obtained in 65 (55%) of 118 unselected asthmatic children. These 65 children were skin tested and their sera examined for specific IgE using the radioallergosorbent test. Those children who had apparent clinical sensitivities had larger skin test reactions and were more likely to have positive specific IgE results than those without apparent sensitivities. Positive skin tests were very common (80%), but the larger the skin test reaction (weal diameter greater than 4 mm diameter) the more likely was there to be a positive history or a positive specific IgE result. Hence a large skin test reaction can provide a helpful pointer to animal allergy of clinical importance. Commercially available animal extracts have limitations for diagnostic tests. A questionnaire survey of 150 day schools emphasized the potential opportunities for contact with animal allergens at school. 相似文献
64.
口服Carvedilol治疗心力衰竭多中心研究(MOCHA) 总被引:1,自引:0,他引:1
标题 Carvedilol对慢性心力衰竭患者左心室功能的改善和存活的提高呈剂量相关性作者 BristowMR,GilbertEM,AbrahamWT,等 Circulation1996,94:2807~2816 研究疾病:充血性心力衰竭。目的:对Carvedilol治疗慢性心力衰竭患者剂量-疗效特征进行评价。 设计:随机、双盲、安慰剂对照的多中心研究,剂量效应关系研究。病人资料:共345名心力衰竭患者,年龄18~85岁,左室射血分数≤0-35,心力衰竭症状时间≥3月,研究前所有患者必须用利… 相似文献
65.
66.
A Dinota P L Tazzari A Bontadini D Raspadori C Tassi L Zucchini M Pizzuti F Ricciuti M Gobbi 《Haematologica》1990,75(4):323-326
An assay based on the inhibition of the cloning capacity in a plasma clot semisolid medium assay has been used to test the sensitivity of the Raji cell line to lymphokine-activated killer (LAK) cells. This method overcomes some limitations intrinsic to the widely employed 51Cr release assay and always shows a higher degree of sensitivity. No inhibition of colony growth was found when the effector cells were plated without prior pre-incubation with interleukin 2 or with the addition of the medium derived from the LAK cells. Though more time-consuming than the classic 51Cr release assay, this technique does not require radioactive material. This test may be suitable for a more precise evaluation of LAK activity and for the study of the mechanisms involved in cell killing. 相似文献
67.
Open-ended interviews with 107 patients documented specific patient expectations of radiologic procedures during which there was no direct radiologist-patient interaction. Patient expectations could be classified into those related to the facility and those related to interactions with radiology staff. Among facility-related expectations, waiting time far outweighed all other concerns. Interpersonal skills were the predominant expectation of radiology staff. The role of the radiologist in fulfilling patient expectations was less clear. Only 10% of unprompted patients cited the radiologist as a factor in their expectations. When patients were specifically prompted to discuss the radiologist's role, communication skills, accuracy of interpretation, and interpersonal skills were the predominant concerns. 相似文献
68.
69.
70.
Pulmonary embolism after hip or knee replacement: postoperative changes on pulmonary scintigrams in asymptomatic patients 总被引:1,自引:0,他引:1
Foley M; Maslack MM; Rothman RH; Casey MP; Lugano EM; Parry CE; Balderston RA; Booth RE Jr 《Radiology》1989,172(2):481-485
Serial pulmonary imaging has proved to be effective in the evaluation of patients undergoing total joint arthroplasty. A clinical dilemma arises in asymptomatic patients whose postoperative pulmonary images differ from the preoperative images. The authors prospectively evaluated 403 patients with serial imaging to determine the significance of changed postoperative images in asymptomatic patients undergoing total hip or knee arthroplasty. Twenty-two (5.5%) patients had significant changes on postoperative images. Seventeen were asymptomatic; all but one underwent pulmonary angiography. Documented pulmonary emboli were demonstrated in 100% of patients whose postoperative images changed to indicate a high probability of pulmonary embolism, 71% whose images changed to a moderate probability, and 0% whose images changed to indeterminate probability. Overall, pulmonary emboli occurred in 76% of all asymptomatic patients with significantly change postoperative images. Asymptomatic pulmonary embolism is a significant occurrence after total hip or knee repair, and a changed lung scan with appropriate clinical evaluation is an accurate indicator of pulmonary emboli in asymptomatic postarthroplasty patients. 相似文献