全文获取类型
收费全文 | 1679篇 |
免费 | 133篇 |
国内免费 | 19篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 127篇 |
妇产科学 | 11篇 |
基础医学 | 187篇 |
口腔科学 | 72篇 |
临床医学 | 193篇 |
内科学 | 315篇 |
皮肤病学 | 46篇 |
神经病学 | 137篇 |
特种医学 | 255篇 |
外科学 | 162篇 |
综合类 | 47篇 |
一般理论 | 1篇 |
预防医学 | 92篇 |
眼科学 | 18篇 |
药学 | 45篇 |
1篇 | |
肿瘤学 | 121篇 |
出版年
2021年 | 13篇 |
2020年 | 12篇 |
2019年 | 15篇 |
2018年 | 21篇 |
2017年 | 16篇 |
2016年 | 19篇 |
2015年 | 35篇 |
2014年 | 32篇 |
2013年 | 61篇 |
2012年 | 56篇 |
2011年 | 47篇 |
2010年 | 67篇 |
2009年 | 63篇 |
2008年 | 35篇 |
2007年 | 56篇 |
2006年 | 64篇 |
2005年 | 49篇 |
2004年 | 43篇 |
2003年 | 41篇 |
2002年 | 40篇 |
2001年 | 49篇 |
2000年 | 27篇 |
1999年 | 41篇 |
1998年 | 87篇 |
1997年 | 84篇 |
1996年 | 65篇 |
1995年 | 57篇 |
1994年 | 43篇 |
1993年 | 52篇 |
1992年 | 36篇 |
1991年 | 47篇 |
1990年 | 34篇 |
1989年 | 61篇 |
1988年 | 47篇 |
1987年 | 34篇 |
1986年 | 23篇 |
1985年 | 30篇 |
1984年 | 15篇 |
1983年 | 18篇 |
1982年 | 20篇 |
1981年 | 17篇 |
1980年 | 16篇 |
1979年 | 6篇 |
1978年 | 17篇 |
1977年 | 20篇 |
1976年 | 14篇 |
1975年 | 10篇 |
1973年 | 10篇 |
1972年 | 5篇 |
1968年 | 6篇 |
排序方式: 共有1831条查询结果,搜索用时 0 毫秒
1.
The complete medical records of 122 patients who sustained traumatic spinal cord injuries were reviewed to determine the frequency and results of emergency room assessments for loss of consciousness (LOC) and post-traumatic amnesia (PTA). Eighty-eight percent of the patients were assessed for LOC and 19% were assessed for PTA. Fifty patients (41% of the total population) admitted to LOC, PTA or both. Fourteen of these 50 patients underwent subsequent radiographic examinations of the skull, all of which were negative. Because of the association of intracranial complications and long-term cognitive sequelae with even brief LOC or PTA, early recognition of craniocerebral trauma is an important component of the acute management of spinal cord injured patients. 相似文献
2.
3.
4.
Pyomyositis: characteristics at CT and MR imaging 总被引:9,自引:0,他引:9
5.
6.
AJ Larner MRCP 《International journal of clinical practice》1994,48(5):272-274
SUMMARY A case is reported of pseudohyperphosphataemia in association with a monoclonal gammopathy of undetermined significance. 相似文献
7.
8.
D De AJ Kanwar S Handa 《Journal of the European Academy of Dermatology and Venereology》2006,20(7):853-859
BACKGROUND: Diagnosis of atopic dermatitis (AD) depends on clinical features because no definitive diagnostic test exists. Criteria proposed by Hanifin and Rajka (Acta Derm Venereol (Stockh) 1980; Suppl 92: 44-47) were acceptable for hospital-based studies but were found not to be suitable for field studies. A UK working party formulated clinical diagnostic criteria that could be used in both hospital and epidemiological settings. Validation studies of the criteria showed widely variable results, probably due to different clinical settings and ethnicity. AIM AND OBJECTIVE: This study was undertaken to validate Hanifin and Rajka's criteria and to assess the comparative efficacy of their criteria and the UK working party's diagnostic criteria in the diagnosis of AD in a hospital setting in North India. SUBJECTS AND METHODS: This study serially included 101 patients with AD and 48 controls of paediatric age group. The study period was from July 2003 to December 2004. RESULTS: Hanifin and Rajka's criteria (sensitivity 96%, specificity 93.75%, positive predictive value 97% (PPV) and negative predictive value (NPV) 91.84%) had a statistical advantage over the UK working party's diagnostic criteria (sensitivity 86%, specificity 95.83%, PPV 97.75% and NPV 76.67%), with a P-value < 0.005. 相似文献
9.
SUMMARY Impotence is a common symptom which can cause considerable distress to both the sufferer and his partner. The use of pharmacotherapy to improve erectile function will continue to increase as safe and effective drugs are developed. However, restoring erectile function should not be the only treatment objective. It is also essential to address personal and emotional factors in the sufferer, conflicts in his relationship with his partner, and sexual problems in his partner, all of which may be instrumental in causing or maintaining the presenting impotence. We advocate a combined approach with appropriate medical treatment and sex and couple therapy 相似文献
10.
V Raptopoulos A Davidoff A Karellas M A Davis B L Coolbaugh E H Smith 《AJR. American journal of roentgenology》1988,150(6):1303-1306
Visualization of the head of the pancreas by CT was prospectively evaluated in two groups of 100 patients who did not have pancreatic disease. Patients were given either a fat-density oral contrast material (12.5% corn-oil emulsion and metoclopramide) or a conventional high-density oral contrast material (barium suspension or iodinated solution). There was no statistically significant difference in the subjects' tolerance to the two regimens. There was, however, a significant improvement in ability to distinguish the head of the pancreas from the duodenal C-loop when the fat-density contrast material was given. When pancreaticoduodenal discrimination was graded, patients given corn-oil emulsion and metoclopramide received an average score of 0.94, whereas those given the high-density agent received an average score of 0.74, with 1.00 being the highest possible score (p less than .005). These data suggest that for routine CT evaluation of the head of the pancreas, a combination of corn-oil emulsion and metoclopramide may be superior to the conventional high-density oral contrast agents given without metoclopramide. 相似文献