全文获取类型
收费全文 | 3002篇 |
免费 | 217篇 |
国内免费 | 13篇 |
专业分类
耳鼻咽喉 | 15篇 |
儿科学 | 297篇 |
妇产科学 | 71篇 |
基础医学 | 397篇 |
口腔科学 | 35篇 |
临床医学 | 298篇 |
内科学 | 429篇 |
皮肤病学 | 68篇 |
神经病学 | 112篇 |
特种医学 | 49篇 |
外科学 | 370篇 |
综合类 | 130篇 |
预防医学 | 222篇 |
眼科学 | 109篇 |
药学 | 371篇 |
中国医学 | 28篇 |
肿瘤学 | 231篇 |
出版年
2023年 | 33篇 |
2022年 | 37篇 |
2021年 | 83篇 |
2020年 | 73篇 |
2019年 | 65篇 |
2018年 | 82篇 |
2017年 | 63篇 |
2016年 | 59篇 |
2015年 | 80篇 |
2014年 | 104篇 |
2013年 | 130篇 |
2012年 | 242篇 |
2011年 | 214篇 |
2010年 | 117篇 |
2009年 | 92篇 |
2008年 | 115篇 |
2007年 | 120篇 |
2006年 | 140篇 |
2005年 | 114篇 |
2004年 | 117篇 |
2003年 | 88篇 |
2002年 | 101篇 |
2001年 | 60篇 |
2000年 | 69篇 |
1999年 | 72篇 |
1998年 | 44篇 |
1997年 | 25篇 |
1996年 | 29篇 |
1994年 | 20篇 |
1993年 | 22篇 |
1992年 | 54篇 |
1991年 | 43篇 |
1990年 | 34篇 |
1989年 | 30篇 |
1988年 | 39篇 |
1987年 | 29篇 |
1986年 | 40篇 |
1985年 | 35篇 |
1984年 | 25篇 |
1983年 | 26篇 |
1979年 | 15篇 |
1978年 | 15篇 |
1977年 | 12篇 |
1976年 | 16篇 |
1974年 | 14篇 |
1973年 | 15篇 |
1972年 | 12篇 |
1971年 | 17篇 |
1970年 | 20篇 |
1968年 | 12篇 |
排序方式: 共有3232条查询结果,搜索用时 15 毫秒
41.
42.
Mitral valve resistance determines hemodynamic consequences of severe rheumatic mitral stenosis and immediate outcomes of percutaneous valvuloplasty 下载免费PDF全文
43.
44.
45.
Véronique Chajès Carine Biessy Graham Byrnes Geneviève Deharveng Mitra Saadatian-Elahi Mazda Jenab 《Nutrition and cancer》2013,65(8):1235-1250
Elaidic acid is the main unnatural trans fatty acid isomer occurring during partial hydrogenation of vegetable oils used as ingredients for the formulation of processed foods. The main objective is to assess associations between processed food intakes and plasma phospholipid elaidic acid concentrations within the European Prospective Investigation into Cancer and Nutrition study. A cross-sectional study was used to determine fatty acid profiles in 3,003 subjects from 16 centers. Single 24-h dietary recalls (24-HDR) were collected using a standardized computerized interview program. Food intakes were computed according to their degree of processing (moderately/nonprocessed foods, processed staple foods, highly processed foods). Adjusted ecological and individual correlations were calculated between processed food intakes and plasma elaidic acid levels. At the population level, mean intakes of highly processed foods were strongly correlated with mean levels of plasma elaidic acid in men (P = 0.0016) and in women (P = 0.0012). At the individual level, these associations remained but at a much lower level in men (r = 0.08, P = 0.006) and in women (r = 0.09, P = 0.0001). The use of an averaged 24-HDR measure of highly processed food intakes is adequate for predicting mean levels of plasma elaidic acid among European populations. 相似文献
46.
47.
Anirban P. Mitra Adrian S. Fairey Eila C. Skinner Stephen A. Boorjian Igor Frank Mark P. Schoenberg Trinity J. Bivalacqua M. Eric Hyndman Adam C. Reese Gary D. Steinberg Michael C. Large Christina A. Hulsbergen-van de Kaa Harman M. Bruins Siamak Daneshmand 《Urologic oncology》2019,37(1):48-56
Purpose
To determine the association of micropapillary urothelial carcinoma (MUC) variant histology with bladder cancer outcomes after radical cystectomy.Materials and Methods
Information on MUC patients treated with radical cystectomy was obtained from five academic centers. Data on 1,497 patients were assembled in a relational database. Tumor histology was categorized as urothelial carcinoma without any histological variants (UC; n?=?1,346) or MUC (n?=?151). Univariable and multivariable models were used to analyze associations with recurrence-free (RFS) and overall (OS) survival.Results
Median follow-up was 10.0 and 7.8 years for the UC and MUC groups, respectively. No significant differences were noted between UC and MUC groups with regard to age, gender, clinical disease stage, and administration of neoadjuvant and adjuvant chemotherapy (all, P ≥ 0.10). When compared with UC, presence of MUC was associated with higher pathologic stage (organ-confined, 60% vs. 27%; extravesical, 18% vs. 23%; node-positive, 22% vs. 50%; P < 0.01) and lymphovascular invasion (29% vs. 58%; P < 0.01) at cystectomy. In comparison with UC, MUC patients had poorer 5-year RFS (70% vs. 44%; P < 0.01) and OS (61% vs. 38%; P < 0.01). However, on multivariable analysis, tumor histology was not independently associated with the risks of recurrence (P?=?0.27) or mortality (P?=?0.12).Conclusions
This multi-institutional analysis demonstrated that the presence of MUC was associated with locally advanced disease at radical cystectomy. However, clinical outcomes were comparable to those with pure UC after controlling for standard clinicopathologic predictors. 相似文献48.
49.
Sudip K. Das Kaustuv Das Biswas Arunava Sengupta Sumit Mitra Ranjan Paul 《Indian journal of otolaryngology and head and neck surgery》2011,63(4):400-401
Paraganglioma is a rare tumor in head and neck region. A 35 years male presented with huge swelling of tonsillar region occupying a large portion of oropharynx. Tumor had been dissected out transorally. HPE showed extra-adrenal paraganglioma. It is being reported because of its rare clinical presentation and unusual surgical approach. 相似文献
50.