首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   38192篇
  免费   3863篇
  国内免费   2538篇
耳鼻咽喉   326篇
儿科学   525篇
妇产科学   427篇
基础医学   3993篇
口腔科学   761篇
临床医学   5206篇
内科学   5557篇
皮肤病学   374篇
神经病学   1536篇
特种医学   1272篇
外国民族医学   22篇
外科学   3941篇
综合类   6875篇
现状与发展   8篇
一般理论   2篇
预防医学   2717篇
眼科学   1055篇
药学   4418篇
  38篇
中国医学   2397篇
肿瘤学   3143篇
  2024年   193篇
  2023年   727篇
  2022年   1792篇
  2021年   2233篇
  2020年   1757篇
  2019年   1374篇
  2018年   1393篇
  2017年   1411篇
  2016年   1229篇
  2015年   1877篇
  2014年   2348篇
  2013年   2179篇
  2012年   3001篇
  2011年   3156篇
  2010年   2198篇
  2009年   1778篇
  2008年   2146篇
  2007年   2004篇
  2006年   1949篇
  2005年   1532篇
  2004年   1180篇
  2003年   1002篇
  2002年   906篇
  2001年   706篇
  2000年   682篇
  1999年   673篇
  1998年   434篇
  1997年   417篇
  1996年   368篇
  1995年   344篇
  1994年   309篇
  1993年   179篇
  1992年   215篇
  1991年   161篇
  1990年   126篇
  1989年   108篇
  1988年   117篇
  1987年   114篇
  1986年   95篇
  1985年   70篇
  1984年   28篇
  1983年   25篇
  1982年   12篇
  1981年   16篇
  1980年   7篇
  1979年   11篇
  1978年   2篇
  1963年   1篇
  1962年   1篇
  1961年   1篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
Objective: To evaluate the long-term clinical effect of high-intensity focussed ultrasound (HIFU) as a non-invasive modality for ablation of abdominal wall endometriosis (AWE) foci.

Methods: All women who were diagnosed with cutaneous endometriosis and underwent HIFU ablation and 4-year follow-up were included. Patient symptoms, imaging performed, HIFU ablation, recurrence, lesion location, size and number were collected and analyzed.

Results: A total of 51 women with 57 painful abdominal wall masses with a median volume of 4.00?cm3 and a mean age of 30.5±2.12 years were treated with HIFU. The main symptoms were a palpable painful abdominal mass (93%), protrusion of the skin (28.1%, 16) or lack of protrusion of the skin (71.9%, 41). Ultrasound was initially performed in 100% (51) of women, whereas 6% (3) required MRI examinations to distinguish the features and range of the masses. Ablation was performed with a median 300?s of sonication time, 40?min treatment time, 150?W of power and 41800?J of total energy to treat lesions that were a median volume of 3.83?cm3. No severe complications occurred, except in one patient with a first-degree skin burn, during the 48-month follow-up period. The pooled recurrence of cutaneous endometriosis occurred in 3.9% (2) of women.

Conclusion: The diagnosis of AWE should be confirmed with imaging of the lesion number, location, size and features before HIFU ablation. HIFU should be the first choice for the treatment of AWE as it is a non-invasive method, with high efficiency and safety and rapid postoperative recovery.  相似文献   

2.
3.
4.
Background: Previous genome-wide association study (GWAS) has revealed the association between MYP10 at 8p23 and MYP15 at 10q21.1 and high myopia (HM) in a French population. This study is managed to discover the connection between some single nucleotide polymorphism (located at MYP10 and MYP15) and Han Chinese HM.

Methods and Results: This case-control association study contained 1673 samples, including 869 ophthalmic patients and 804 controls. Twelve tag SNPs have been selected from the MYP10 and MYP15 loci and genotyped by SNaPshot method. Among 12 SNPs, rs4840437 and rs6989782 in TNKS gene were found significant association with HM. Carriers of rs4840437G allele and rs4840437GG genotype created a low risk of high myopia (P = .036, OR = 0.81, 95%CI = 0.71–0.93; P = .016, OR = 0.73, 95%CI = 0.56–0.96; respectively). Carriers of rs6989782T allele and rs6989782TT+CT genotype also had a decreased risk of high myopia (P = .048, OR = 0.82, 95%CI = 0.71–0.94; P = .006, OR = 0.74, 95%CI = 0.59–0.92; respectively). Other 10 SNPs displaced nonsignificant association with HM. Additionally, the risk haplotype AC and the protective haplotype GT, generated by two SNPs in TNKS, were considerably more likely to be association with HM (for AC, P = .002 and OR = 1.26; for GT, P = .027 and OR = 0.84).

Conclusions: Our results demonstrated that some heritable variants in the TNKS gene are associated with HM in the Han population. The possible functions of TNKS in the development and pathogenesis of hereditary high myopia still require further researches to identify.  相似文献   

5.
目的 探讨米索前列醇联合依沙吖啶在中晚期妊娠引产中的应用效果。方法 选取西安交通大学附属3201医院2012年1月—2017年12月收治的138例中晚期妊娠引产患者,按引产方式分为对照组、观察组,各69例。对照组使用乳酸依沙吖啶注射液进行引产,观察组在对照组的基础上联合使用米索前列醇进行引产。比较两组引产效果、胎儿娩出时间、阴道出血量及不良反应的发生情况。结果 观察组引产有效率是100%,显著高于对照组的91.75%(P<0.05)。观察组胎儿娩出时间<35 h的人数占比显著高于对照组(P<0.05)。观察组患者阴道出血量显著低于对照组(P<0.05),两组不良反应的发生率间差异不显著。结论 米索前列醇联合依沙吖啶在中晚期妊娠引产中的效果较好,可显著提高引产有效率、缩短胎儿娩出时间,值得临床应用。  相似文献   
6.
目的:探究桃红四物汤联合银杏酮酯滴丸治疗老年出血性玻璃体混浊的临床疗效。方法:收集2016年12月-2018年12月我院收治的老年出血性玻璃体混浊患者67例,共67眼,根据随机对照表分为对照组和试验组,其中试验组34例,对照组33例,对照组予以银杏酮酯滴丸;试验组在对照组的基础上联用桃红四物汤。两组均服用30 d。治疗结束后对比分析两组患者临床疗效、出血吸收时间、血液流变学及视网膜中央动脉血流动力学。结果:治疗后两组患者高切全血粘度、低切全血粘度、纤维蛋白原、阻力指数(Resistance Index,RI)低于治疗前,收缩期峰值速度(Peak Systolic Velocity,PSV)、舒张末期血流速度(End Diastolic Velocity,EDV)高于治疗前,差异具有统计学意义(P<0.05);治疗后试验组临床总有效率、PSV、EDV高于对照组,出血吸收时间、高切全血粘度、低切全血粘度、纤维蛋白原、RI低于对照组,差异具有统计学意义(P<0.05)。结论:桃红四物汤联合银杏酮酯滴丸治疗老年出血性玻璃体混浊临床疗效显著,适宜临床应用推广。  相似文献   
7.
8.
目的探讨极速实时荧光聚合酶链反应(polymerase chain reaction,PCR)、实时荧光PCR、酶联免疫吸附测定(enzyme-linked immunosorbent assay,ELISA)和胶体金免疫层析法(gold immunochromatography assay,GICA)4种方法检测新型布尼亚病毒的特异度和灵敏度,为发热伴血小板减少综合征的早期诊断提供依据。方法采集2017年6月1日至9月30日山东大学附属济南市传染病医院86例临床诊断为发热伴血小板减少综合征患者的血清样本,分别应用极速实时荧光PCR、实时荧光PCR、ELISA和GICA 4种方法进行检测。统计学分析采用χ^2检验。结果86份患者血清标本中,极速实时荧光PCR、实时荧光PCR、IgM-ELISA、IgG-ELISA、IgM-GICA、IgG-GICA的新型布尼亚病毒阳性分别为82份(95.34%)、79份(91.86%)、41份(47.67%)、8份(9.3%)、19份(22.09%)和3份(3.49%)。极速实时荧光PCR特异度为100%,灵敏度达到1×103拷贝/mL,3次重复扩增试验显示其Ct值变异系数均<2%。在发热伴血小板减少综合征进展的1期、2期、3期病程中,极速实时荧光PCR的阳性检出率为41份(97.62%)、34份(94.44%)、7份(87.50%),实时荧光PCR的阳性检出率为39份(92.86%)、33份(91.67%)、7份(87.50%),在1期和2期两个病程,极速实时荧光PCR阳性检出率略高;IgM-ELISA阳性检出率从1期(28.57%)到3期(87.50%)显著增高,2期、3期与1期相比,差异均有统计学意义(χ^2=8.347、7.561,均P<0.01);IgM-GICA的阳性检出率从1期(14.29%)到2期(33.33%)也有增高,差异有统计学意义(χ^2=3.962,P<0.05),但与其他方法相比,其检出率偏低。1期,实时荧光PCR阳性检出率显著高于ELISA(IgM和IgG)和GICA(IgM和IgG),差异均有统计学意义(χ^2=33.740、55.080、49.010、64.340,均P<0.01)。2期,实时荧光PCR的阳性检出率高于ELISA(IgM和IgG)和GICA(IgM和IgG),差异均有统计学意义(χ^2=7.700、46.720、23.700、50.630,均P<0.01)。3期,极速实时荧光PCR、实时荧光PCR和IgM-ELISA表现出同样高的阳性检出率,远高于IgG-ELISA和GICA(IgM和IgG)。实时荧光PCR阳性检出率和IgG-ELISA、IgM-GICA、IgG-GICA之间差异均有统计学意义(均χ^2=6.250,P<0.05)。结论极速实时荧光PCR在新型布尼亚病毒的早期检测中有更高的灵敏度和特异度,且重复性好、稳定度高,与传统实时荧光PCR相比大大缩短了扩增时间,对发热伴血小板减少综合征的早期快速诊断具有重要价值。  相似文献   
9.
Abstract

Background and aim: Capsule retention is the most common adverse event associated with video capsule endoscopy. The use of double-balloon enteroscopy-assisted capsule endoscope retrieval has been increasingly reported in recent years. However, evidence is limited regarding its success rate, associated factors, and subsequent clinical outcomes.

Methods: A systematic review of relevant studies published before January 2019 was performed. Successful retrieval rate and associated factors, rate of endoscopic balloon dilation, and outcomes after double-balloon enteroscopy were summarized and pooled.

Results: Within 154 associated original articles, 12 including 150 cases of capsule retrieval by double-balloon enteroscopy were included. The estimated pooled successful retrieval rate was 86.5% (95% confidence interval, 75.6–95.1%). Anterograde approach and capsules retained in the jejunum or trapped by malignant strictures were associated with a higher successful retrieval rate than the retrograde approach (62/83 [74.7%] vs. 10/38 [26.3%], p?<?.001) and capsules retained in the ileum (41/41 [100.0%] vs. 43/58 [74.1%], p?<?.001) or trapped by benign strictures (21/21 [100.0%] vs. 65/83 [78.3%], p?=?.043). Endoscopic balloon dilation was performed in 38.8% (95% confidence interval, 22.3–56.3%) of patients with benign strictures. Two perforations (1.3%) were reported as severe adverse events after double-balloon enteroscopy. A significantly lower surgery rate was found among cases with successful video capsule removal compared with unsuccessful cases (7.2% vs. 38.5%, p?=?.002).

Conclusions: Double-balloon enteroscopy is feasible and safe for removing retained video capsule endoscopes, and its use could decrease the need for surgery in patients with benign strictures and facilitate subsequent surgery in patients with malignant strictures.  相似文献   
10.
论护士审美修养的条件和形式   总被引:3,自引:1,他引:2  
刘叶  张爽 《护理学杂志》2006,21(8):73-75
护士的审美修养是全面提升护士自身素质的内在要求,以人的健康长寿、职业道德以及护士内在美与外在美的统一为条件.学校教育、社会教育、自然美教育、艺术美教育是其基本途径.护士审美修养贵在自觉和持之以恒.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号