全文获取类型
收费全文 | 110096篇 |
免费 | 12035篇 |
国内免费 | 7519篇 |
专业分类
耳鼻咽喉 | 872篇 |
儿科学 | 1793篇 |
妇产科学 | 1076篇 |
基础医学 | 9990篇 |
口腔科学 | 2093篇 |
临床医学 | 15576篇 |
内科学 | 12961篇 |
皮肤病学 | 1069篇 |
神经病学 | 3862篇 |
特种医学 | 3880篇 |
外国民族医学 | 46篇 |
外科学 | 7611篇 |
综合类 | 24659篇 |
现状与发展 | 36篇 |
一般理论 | 2篇 |
预防医学 | 10678篇 |
眼科学 | 3082篇 |
药学 | 13456篇 |
198篇 | |
中国医学 | 9452篇 |
肿瘤学 | 7258篇 |
出版年
2024年 | 637篇 |
2023年 | 1990篇 |
2022年 | 4940篇 |
2021年 | 6086篇 |
2020年 | 5087篇 |
2019年 | 3666篇 |
2018年 | 3668篇 |
2017年 | 4192篇 |
2016年 | 3380篇 |
2015年 | 5516篇 |
2014年 | 6839篇 |
2013年 | 7215篇 |
2012年 | 10142篇 |
2011年 | 10917篇 |
2010年 | 7800篇 |
2009年 | 6400篇 |
2008年 | 7043篇 |
2007年 | 6544篇 |
2006年 | 6091篇 |
2005年 | 4897篇 |
2004年 | 3277篇 |
2003年 | 2973篇 |
2002年 | 2298篇 |
2001年 | 1815篇 |
2000年 | 1455篇 |
1999年 | 1179篇 |
1998年 | 662篇 |
1997年 | 629篇 |
1996年 | 435篇 |
1995年 | 434篇 |
1994年 | 320篇 |
1993年 | 176篇 |
1992年 | 165篇 |
1991年 | 150篇 |
1990年 | 150篇 |
1989年 | 97篇 |
1988年 | 97篇 |
1987年 | 58篇 |
1986年 | 53篇 |
1985年 | 50篇 |
1984年 | 33篇 |
1983年 | 13篇 |
1982年 | 10篇 |
1981年 | 14篇 |
1980年 | 7篇 |
1979年 | 16篇 |
1977年 | 5篇 |
1970年 | 7篇 |
1967年 | 3篇 |
1966年 | 3篇 |
排序方式: 共有10000条查询结果,搜索用时 156 毫秒
11.
目的探讨用游离自体腹白线片修补急性十二指肠溃疡穿孔的应用价值。方法从2006年1月至2006年7月对13例用自体腹白线片修补急性十二指肠溃疡穿孔的病人的临床资料和随访情况进行回顾性分析,其中2例穿孔大于2cm2,平均手术时间60分钟,平均失血量20ml,平均住院天数9±1天。结果游离自体腹白线片修补急性十二指肠溃疡穿孔13例均痊愈出院。随访15天至6个月,无手术并发症。结论本方法操作较简单、安全、效果好,其适应症广,是一种可行的新方法。 相似文献
12.
Jing‐Long Huang Liang‐Shiou Ou Ching‐Hsiung Tsao Li‐Chen Chen Ming‐Ling Kuo 《Pediatric allergy and immunology》2002,13(6):426-433
T lymphocytes play a fundamental role in the initiation and regulation of chronic inflammatory responses in patients with asthma. CD69 is an early marker of T‐cell activation. The levels of intercellular adhesion molecule‐1 (ICAM‐1, CD54) and L ‐selectin have been reported to increase in patients with allergic diseases and asthma. The present study was therefore undertaken to investigate the expression of CD69, CD54, and L ‐selectin by T lymphocytes of children with asthma, before and after immunotherapy. Eighteen children newly diagnosed with asthma, 11 good and nine poor responders to immunotherapy, and 16 normal subjects, were enrolled in this study. The percentages of CD69+, CD54+, and CD62L+ cells in T lymphocytes were measured by using flow cytometry. The levels of CD69, CD54, and CD62L in serum and culture supernatants were determined by using enzyme‐linked immunosorbent assay (ELISA). The expression of CD69 and CD54 on CD3+ T lymphocytes was significantly higher in children with asthma than in control patients. All the patient groups expressed (spontaneously and following stimulation with phorbol myristate acetate and ionomycin together with mite‐extract proteins) greater amounts of CD69 and CD54 than did control subjects. With long‐term immunotherapy, the percentages of CD69+ and CD54+ T lymphocytes were significantly lower in patients with a good response to immunotherapy. Our results also showed significantly lower serum L ‐selectin levels following immunotherapy. In conclusion, successful immunotherapy resulted in decreased expression and production of CD69 and CD54. These results may explain, in part, the clinical efficacy of immunotherapy. 相似文献
13.
Clinical observation of Qi deficiency syndrome in 72 patients with chronic obstructive pulmonary disease treated with Yiqi Mianyi Granule 下载免费PDF全文
Seventy-two patients of chronic obstructive pulmonary disease (COPD) of Qi deficiency syndrome with abnormal immune indices were treated with Yiqi Mianyi Granule (YQMYG) and the efficacy was compared with that of 30 cases treated with Zhenqi fuzheng Granule (ZQFZG) for control. Results showed that the markedly effective rate of symptomatic improvement of Qi deficiency in YQMYG group was 65.3%, the total effective rate 93.1%. 88.6% of the immune indices lower than normal were corrected and 43. 7% of them were normalized, while for indices that were higher than normal the rate were 78.2% and 52.9% respectively. These results suggested that YQMYG could improve symptom of Qi Deficiency markedly, strengthen cellular immunity and regulate immune dysfunction. Its therapeutic efficacy was obviously superior to ZQFZG (P<0.Q5). 相似文献
14.
介绍东芝DFP-2000A数字减影系统维修实例,并论述该机图像存储系统采用的RAID3等级的磁盘阵列。 相似文献
15.
Background : The present paper addressed the issue of whether pretreatment with intravenous (IV) chemotherapy affects response rate or survival in patients receiving hepatic artery chemotherapy (HAC). Methods : Case note reviews of 164 patients treated in a teaching hospital from June 1990 to July 1996 were carried out. Results : The response rate and carcino-embryonic antigen (CEA) fall in the two groups was almost identical. There was a nonsignificant survival advantage in the non-pretreatment group. Conclusions : Previous administration of IV chemotherapy did not affect the CEA response of patients receiving HAC. 相似文献
16.
内脏高敏感与功能性胃肠病 总被引:3,自引:0,他引:3
功能性胃肠病(functional gastrointestinal disorders,FGIDs)是指一组以慢性或反复发作的消化道症状就诊,但无明确胃肠黏膜结构改变或生化异常可查的症候群。心理、社会因素可加重FGIDs患者症状,患者可同时伴有躯体症状[1]。其发病机制目前尚不明确,最初该类疾病被认为是胃肠神经官能症,大量的流行病学资料表明,尽管精神压力与患者症状发作有关,但主要还是决定于患者的就医行为。此后,FGIDs发病机制的研究又集中在胃肠动力改变方面,肠易激综合征患者(IBS)、功能性消化不良患者(FD)、非心源性胸痛患者(NCCP)均发现了各种胃肠动力异… 相似文献
17.
小儿先心病术后左房夺和肺动脉压力的监测在ICU中十分重要。心电图是论断和评价心脏疾患的常用方法。本文分析了32例小儿先心病手术前后(伴肺动脉高压16例)6个肢体导联心电图中P波和QRS波时限总和及振幅总和与左房、肺动脉压力的关系。结果表明两者均有良好的相关性(r=0.85 ̄0.88,r=0m74 ̄0.80,P〈0.01),该法简单、方便,可广泛开展,尤其在术后未放置PA和LA管或在IOU中已拨除L 相似文献
18.
19.
<正> 记录外周神经动作电位的实验中往往有难以克服的刺激伪迹。特别所记录的外周神经比较短时,此问题更为突出。一般常用的消除刺激伪迹方法亦不易奏效。通过摸索,我们找到一种简单的消除方法。现介绍如下: 相似文献
20.
超声引导下肿瘤内注射^90钇玻璃微球的肝癌综合治疗 总被引:12,自引:0,他引:12
超声引导下对28例肝癌病人进行了肿瘤内注射^90钇玻璃微球(Y-90GT MS)为主的综合性治疗(部分病人配合肿块周边注射无水酒精及门静脉穿刺化疗)。随访2~16个月(平均7.9个月),病人全健在。肿瘤缩小率为91%,其中显著缩小达75%;肿块回声呈致密增强,少数呈混合型或等回声型;肿瘤内及周边血流信号显著减少;原甲胎蛋白升高者13例,11例显著下降,其中6例降至正常;病人症状减轻,全身情况改善。 相似文献