全文获取类型
收费全文 | 402964篇 |
免费 | 37363篇 |
国内免费 | 28106篇 |
专业分类
耳鼻咽喉 | 3030篇 |
儿科学 | 5256篇 |
妇产科学 | 4391篇 |
基础医学 | 43848篇 |
口腔科学 | 6581篇 |
临床医学 | 56862篇 |
内科学 | 54296篇 |
皮肤病学 | 4396篇 |
神经病学 | 19278篇 |
特种医学 | 14541篇 |
外国民族医学 | 231篇 |
外科学 | 35359篇 |
综合类 | 76545篇 |
现状与发展 | 94篇 |
一般理论 | 31篇 |
预防医学 | 30023篇 |
眼科学 | 11357篇 |
药学 | 44096篇 |
464篇 | |
中国医学 | 26621篇 |
肿瘤学 | 31133篇 |
出版年
2024年 | 1378篇 |
2023年 | 5881篇 |
2022年 | 15445篇 |
2021年 | 19619篇 |
2020年 | 15467篇 |
2019年 | 12457篇 |
2018年 | 12966篇 |
2017年 | 12549篇 |
2016年 | 11494篇 |
2015年 | 18038篇 |
2014年 | 22515篇 |
2013年 | 20643篇 |
2012年 | 30735篇 |
2011年 | 34440篇 |
2010年 | 23375篇 |
2009年 | 19095篇 |
2008年 | 23258篇 |
2007年 | 22951篇 |
2006年 | 21839篇 |
2005年 | 20667篇 |
2004年 | 13726篇 |
2003年 | 13143篇 |
2002年 | 10776篇 |
2001年 | 9241篇 |
2000年 | 8904篇 |
1999年 | 8923篇 |
1998年 | 5596篇 |
1997年 | 5392篇 |
1996年 | 4170篇 |
1995年 | 3912篇 |
1994年 | 3326篇 |
1993年 | 2140篇 |
1992年 | 2535篇 |
1991年 | 2248篇 |
1990年 | 1886篇 |
1989年 | 1634篇 |
1988年 | 1339篇 |
1987年 | 1230篇 |
1986年 | 995篇 |
1985年 | 697篇 |
1984年 | 380篇 |
1983年 | 282篇 |
1982年 | 149篇 |
1981年 | 176篇 |
1980年 | 118篇 |
1979年 | 157篇 |
1978年 | 73篇 |
1977年 | 53篇 |
1974年 | 42篇 |
1972年 | 37篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
21.
目的 探讨Lugol液染色对食管早期癌和癌前病变的诊断价值。方法 对45例食管黏膜可疑病变经内镜以2%Lugol液喷洒染色,观察黏膜染色情况,并取活检送病理组织学检查。结果 45例食管病变染色后,39例呈浅染色或不染色,其中食管癌8例(食管早期癌5例,进展期癌3例),Barrett食管5例,轻至中度不典型增生1l例。本组Lugol液染色对食管早期癌和癌前病变的检出率达46.7%。结论 内镜下应用Lugol液染色结合活检有助于食管早期癌和癌前病变的诊断,且操作简便,具有重要的临床价值。 相似文献
22.
Diabetes is a metabolic syndrome characterized by hyperglycemia. When it manifests itself mainly in hyperglycemia, hypertension, hyperlipemia, hyperurecemia, and obesity, it is also called Ⅹ syndrome, or insulin-resistance syndrome. Step 1. Identifying t… 相似文献
23.
目的观察前置胎盘孕妇的恐惧心理反应,做好前置胎盘孕妇的心理护理。方法由孕妇自行填写CES-D和SA2量表,进行统计学分析。结果70.2%的前置胎盘孕妇具有恐惧心理。结论在妊娠过程应提高孕妇认知水平,加强心理护理,有助于她们顺利渡过妊娠期。 相似文献
24.
李振华教授治疗崩漏经验 总被引:1,自引:0,他引:1
著名中医学家李振华,现为河南中医学院教授、主任医师,中华中医药学会终身理事及河南分会名誉会长。曾任河南中医学院院长、第七届全国人大代表等职。是全国首批名老中医药专家,也是国务院批准享受政府特殊津贴者。老师治学严谨,博学多闻,精研医理,善于辨证,在长期的医疗实践中 相似文献
25.
外科手术,特别是出血量较大的急诊手术、术中出血较多的心内直视手术、以及颅脑外科手术等用血量大,一直是医疗中棘手的问题,而随着人们对输血所带来并发症的重视,以及近年来血源不足及合理输血、血液保护等,使得自体输血成为主流。本文就自体输血在临床应用,特别是大出血性手术中的应用价值作一综述。 相似文献
26.
OBJECTIVE: To study the effect of high-frequency (100 Hz) repetitive conditioning electrical stimulation (CES, 10 min) on human somatosensory evoked potentials (SEPs) to evaluate if short-term cortical plasticity could be induced. METHODS: Painful electrical stimulations were applied to thumb (D1) and little finger (D5) fingertips, respectively. The 124-channel EEG was recorded from 10 healthy male volunteers. Peak stages around 34, 45, 212, 331 ms were analyzed with focal maximum amplitude (FA) and area magnitude (AM) of scalp field potential, topography, and equivalent current dipole source localisation, comparing before and after two-level CES (high- vs. low-level) applied to the He-Gu acupoint. RESULTS: After a high-level CES, the positive FA and AM of the current efflux showed a significant increase at the early phase 34 ms, and significantly decreased at 45 ms in D1 SEPs. The negative FA and AM of the current influx were significantly increased at late phase 350 ms of the D5 SEPs. Only 36 ms, the z-axis position of dipole was significantly changed from (x: -15.9 mm, y: 29.6 mm, z: 43.9 mm) to (x: -12.9 mm, y: 29.4mm, z: 51.5mm) for the D5 SEPs. CONCLUSIONS: The high-level CES significantly attenuated the subsequent cortical activation (45 ms peak for D1 stimulation). Both low- and high-level CES significantly enhanced the late activities (226, 350 ms) in D5 stimulation. This may be explained by pain sensation change at the level of subcortical cingulate cortex induced by the site-dependent post-effect of CES. SIGNIFICANCE: This study showed cortical plasticity induced by conditioning somatosensory stimulation. 相似文献
27.
Qin Lu Jean-Michel Constantin Ania Nieszkowska Marilia Elman Silvia Vieira Jean-Jacques Rouby 《Critical care (London, England)》2006,10(3):R95-10
Introduction
Positive end-expiratory pressure (PEEP)-induced lung derecruitment can be assessed by a pressure–volume (P–V) curve method or by lung computed tomography (CT). However, only the first method can be used at the bedside. The aim of the study was to compare both methods for assessing alveolar derecruitment after the removal of PEEP in patients with acute lung injury or acute respiratory distress syndrome. 相似文献28.
经皮激光椎间盘减压术治疗椎间盘源性腰痛 总被引:1,自引:0,他引:1
目的探讨经皮激光椎间盘减压术(percutaneous laser disc decompression,PLDD)治疗椎间盘源性腰痛的疗效。方法2002年6月~2004年12月我院对36例椎间盘源性腰痛,采用英国DIOMED公司半导体激光仪,激光功率15W,每个激光脉冲持续1s,间隔1s,照射能量800~1200J。VAS评分评价治疗效果。结果手术时间15~60min,平均30min。32例出现“疼痛复制效应”。36例随访6~36个月,平均11个月,32例有效(术后VAS评分改善≥3分18例,≥分14例),4例无效,有效率88.9%(32/36)。结论PLDD治疗椎间盘源性腰痛安全、有效、微创。 相似文献
29.
Vincent Chung Liang Liu Zhaoxiang Bian Zhongzhen Zhao Wai Leuk Fong Wan Fung Kum Jing Gao Min Li 《Movement disorders》2006,21(10):1709-1715
The objective of this study is to assess the efficacy and safety of herbal medicines (HMs), as a monotherapy or adjunct therapy, compared to placebo or conventional approaches in the treatment of idiopathic Parkinson's disease (PD). We conducted a systematic review of randomized controlled trials from both conventional and alternative medicine sources. Outcome measures were overall improvement, quality of life, reduction of levodopa dose, and adverse events. Nine studies were included, each testing a different HM. Six of the trials had limited internal validity due to major flaws in design, including the lack of proper randomization; insufficient blinding; unclear inclusive criteria in terms of diagnostic criteria, baseline staging, and duration of disease; lack of proper sample size calculation; and insufficient data analysis. Imbalances in gender and ethnicity among the patients in the included trials were observed. No major adverse events emerged, and no specific pattern was detected from the trials describing such data. In addition to major methodological defects, heterogeneity in (1) HM tested, (2) control treatment, and (3) outcome measure hindered in-depth data analysis and synthesis. Current evidence is insufficient to evaluate the efficacy and safety of various HMs. Further studies with improved trial design and reporting, with assessment on cost-effectiveness, quality of life, and qualitative data are warranted. 相似文献
30.
护理本科生创造性思维培训 总被引:1,自引:1,他引:0
[目的]对护理本科生实施创造性思维训练,并评估该训练方案的有效性。[方法]对20名护理本科生实施为期3个月的创造性思维培训,并与24名不接受培训者进行对照。采用《创造性思维练习》量表对培训前后学生的创造性思维进行测定。[结果]培训后实验组较对照组的创造性思维总分及流畅性得分有显著提高(P<0.05);变通性和独创性得分无统计学意义(P>0.05)。[结论]创造性思维培训对提高护理本科生创造性思维总体有效,其中对提高创造性思维的流畅性效果显著。 相似文献