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   346064篇
  免费   24048篇
  国内免费   7449篇
耳鼻咽喉   4173篇
儿科学   9873篇
妇产科学   6793篇
基础医学   28060篇
口腔科学   8012篇
临床医学   38070篇
内科学   43319篇
皮肤病学   4665篇
神经病学   21727篇
特种医学   7926篇
外国民族医学   31篇
外科学   37519篇
综合类   51430篇
现状与发展   13篇
一般理论   30篇
预防医学   34915篇
眼科学   5280篇
药学   30712篇
  393篇
中国医学   31059篇
肿瘤学   13561篇
  2023年   5494篇
  2022年   8097篇
  2021年   13080篇
  2020年   12935篇
  2019年   18669篇
  2018年   16340篇
  2017年   13224篇
  2016年   10756篇
  2015年   10046篇
  2014年   20511篇
  2013年   22339篇
  2012年   18704篇
  2011年   20265篇
  2010年   16220篇
  2009年   14952篇
  2008年   14557篇
  2007年   15011篇
  2006年   13069篇
  2005年   11379篇
  2004年   9290篇
  2003年   8144篇
  2002年   6363篇
  2001年   5703篇
  2000年   4704篇
  1999年   4017篇
  1998年   3093篇
  1997年   2951篇
  1996年   2549篇
  1995年   2634篇
  1994年   2535篇
  1993年   2025篇
  1992年   2049篇
  1991年   1773篇
  1990年   1589篇
  1989年   1419篇
  1988年   1336篇
  1987年   1156篇
  1985年   3814篇
  1984年   4817篇
  1983年   3358篇
  1982年   3827篇
  1981年   3569篇
  1980年   3169篇
  1979年   2915篇
  1978年   2546篇
  1977年   1916篇
  1976年   2153篇
  1975年   1634篇
  1974年   1433篇
  1973年   1279篇
排序方式: 共有10000条查询结果,搜索用时 17 毫秒
991.
Relapsed high‐risk neuroblastoma has few effective therapies currently available or in development. Cabozantinib is an Food and Drug Administration approved multitargeted tyrosine kinase inhibitor for select adult malignancies with preclinical data suggesting efficacy against neuroblastoma. A safe and tolerable dose has been identified for children, but its efficacy remains unknown. We describe four children with relapsed metastatic neuroblastoma treated with cabozantinib. All four patients had extended disease control (two complete responsesfor >12 months, 2 stable disease >6 months) with manageable predictable toxicities requiring dose reduction in two patients. We discuss the potential for the use of cabozantinib in neuroblastoma.  相似文献   
992.
993.
目的对比研究腹腔镜下外生性肾血管平滑肌脂肪瘤"蘑菇状"剜除与标准肾部分切除术的安全性及有效性,为肾血管平滑肌脂肪瘤腹腔镜下"蘑菇状"剜除术术式的建立提供临床依据。 方法选取海南医学院第二附属医院与解放军总医院2018年1月至2019年5月期间,接受腹腔镜手术的肾血管平滑肌脂肪瘤患者53例,其中25例沿肿瘤假包膜行"蘑菇状"剜除术(A组)、28例行肾部分切除术(B组)。比较两组手术患者的肾动脉阻断时间、手术时间、术中出血量、术后24 h血红蛋白、术后eGFR(estimated glomerular filtration rate,估计肾小球率过滤)的变化、术后住院时间和术后肿瘤复发率。 结果53例手术无术中转开放,无死亡病例。肾动脉阻断时间:A组(11.9±2.2)min、B组(21.5±6.5) min(P<0.001)。手术时间:A组(87.9±24.8)min、B组(114.3±38.9) min(P<0.001)。术中出血量:A组20 ml(20~40)ml、B组50 ml(50~100)ml(P<0.001)。术后24 h血红蛋白变化:A组(7.4±4.3) g/L、B组(12.4±8.8) g/L(P=0.013)。术后24 h eGFR变化:A组(6.2±7.2 )ml(min·1.73 m2),B组(12.7±12.8)ml(min·1.73 m2)(P=0.027)。术后6个月eGFR变化:A组(1.5±3.7)ml(min·1.73 m2)、B组(6.5±5.6)ml(min·1.73 m2)(P<0.001)。术后住院时间:A组4.0 d(3~4)d、B组4.5 d(3~6)d(P=0.023)。术后随访两组术后肿瘤均无复发。 结论采用腹腔镜"蘑菇状"剜除术治疗外生性肾血管平滑肌脂肪瘤在肾动脉阻断时间、术中出血量、术后24 h血红蛋白、术后eGFR变化、术后住院时间等方面均优于传统肾部分切除术,两组术后肿瘤均无复发;该方法安全、有效,适于临床推广。  相似文献   
994.
AimTo develop a treatment paradigm for chronic leg ulcers that incorporates new biomarkers of wound healing with currently available therapies.MethodsRecently published data on GM-CSF and MMP-13 as biomarkers of venous leg ulcer (VLU) healing status with accuracies of 92% and 78% respectively, was reviewed along with the wound bed preparation (WBP) theoretical framework for treatment of chronic wounds. The broad categories of wound treatments that align with the WBP concepts were identified. These were then considered in a hierarchical order that initially improves the wound bed and subsequently incorporates more complex advanced wound therapies. Identification of the non-healing status of the wound is the driver to advance through the different treatments.ResultsA point of care test of wound healing status is the key to the systematic use of currently available therapies for chronic leg ulcers in a timely fashion. The different therapies address – debridement, moisture control, bacterial contamination, protease inhibition, formation of granulation tissue, application of growth factors, application of matrix constructs, and application of cellular components. Progression through this hierarchical order of therapies is directed by the leg ulcer remaining in a non-healing state with the previous therapies having been implemented.ConclusionCombining a validated point of care test of wound healing with a systematic approach to wound therapies, has the potential to create a new paradigm of chronic leg ulcer treatment - biomarker directed wound therapy.  相似文献   
995.
目的:评估急性前葡萄膜炎患者中医体质与生存质量的相关性。方法:横断面研究。选取2014年12月 至2017年12月于温州医科大学附属眼视光医院中医眼科专科就诊并经体质评分判定为病理体质的 患者196例,应用中华生存质量量表进行生存质量评分。采用t检验及线性回归分析中医体质与生存 质量评分各领域的相关性。结果:196例患者中单纯体质者147例,复合体质者49例。经广义线性回 归分析,患者的不同体质类型及体质评分与中华生存质量量表评分有显著相关性,进一步分析发现 体质评分与中华生存质量量表评分中的形、情有显著相关性(均P<0.05),与神无显著相关。经线性 回归分析,不同类型中医体质中,气虚、痰湿、血瘀、阳虚、阴虚体质与中华生存质量量表中的形有 显著相关性(均P<0.05);气郁体质与情有显著相关性(P=0.001);而湿热体质与形和情均有显著相关 性(均P<0.001)。结论:急性前葡萄膜炎患者的不同中医体质与中医生存质量密切相关,且对形的影 响最大。  相似文献   
996.
997.
目的 分析神经内科患者医院感染病原菌分布及耐药性,为合理选择临床抗菌药物提供依据。方法 选取 2016 年5 月—2019年5 月滕州市中心人民医院神经内科院内感染患者202例,按照《全国临床检验操作规程》标准分离、鉴定细菌,用K-B纸片法进行药敏试验,统计医院感染情况,并对分离病原菌的分布及耐药情况进行回顾性分析。结果 神经内科院内感染以下呼吸道感染为主,占33.17%,其次为泌尿道和消化系统感染,占比为21.29%和13.86%;共分离病原菌268株,其中革兰阴性菌112株,占41.79%;真菌103株,占38.43%;革兰阳性菌53株,占19.78%。革兰阴性杆菌中大肠埃希菌对亚胺培南、头孢哌酮舒巴坦耐药率低于<15%,对哌拉西林和头孢噻肟耐药率>65%;产ESBLs肺炎克雷伯菌、铜绿假单胞菌和大肠埃希菌检出率为分别为37.50% 、34.62%、38.10%;金黄色葡萄球菌对阿莫西林耐药率为91.30%,革兰阳性球菌对利奈唑胺、万古霉素敏感。结论 神经内科院内感染分离病原菌以革兰阴性菌为主,对常用的抗菌药物耐药率高,应合理选用抗菌药物。  相似文献   
998.
While age-related changes in memory have been well documented, findings about jurors’ perceptions of older witnesses are conflicting. We investigated the effect of victim age (25 vs. 75?years old) and crime severity (victim injured vs. not injured) on mock jurors’ decisions in a robbery trial. Jury-eligible participants (120 women; 84 men) read a mock trial summary and delivered their verdicts online. Mock jurors believed the young victim more than the older victim when the crime was severe, while no age differences emerged for the less severe crime. Whereas previous research demonstrated that juror characteristics were generally associated with culpability, we demonstrated that with case-specific information, these general views became less important. In all, mock jurors were aware of age-related decline in memory provided by eyewitnesses only to a limited extent. Accordingly, in trials involving older witnesses, jurors will benefit from educative information about age-related memory changes.  相似文献   
999.
1000.
BackgroundDistal radial access (DRA) has been proposed to improve procedure ergonomics and favor radial artery patency. Although promising data, nothing is known on evolving hand function after DRA.ObjectivesThis study sought to comprehensively evaluate hand function in patients undergoing DRA.MethodsReal-world patients undergoing DRA undertook a thorough multimodality assessment of hand function implementing multidomain questionnaires (Disabilities of the Arm, Shoulder and Hand and Levine-Katz), and motor (pinch grip test) and sensory (Semmes-Weinstein monofilaments test) examinations of both hands. All assessments were performed at preprocedural baseline and planned at 1-, 6-, and 12-month follow-up (FU). Adverse clinical and procedural events were documented too.ResultsData of 313 patients (220 men, age 66 ± 10 years) from 9 international centers were analyzed. The Disabilities of the Arm, Shoulder and Hand and the Levine-Katz scores slightly improved from baseline to FU (P = 0.008 and P = 0.029, respectively). Pinch strength mildly improved from baseline to FU (P < 0.001 for both the left and right hands). Similarly, touch pressure threshold appeared to faintly improve in both the left and right hands (P < 0.012 for all the sites). For both motor and sensory function tests, comparable findings were found for the DRA hand and the contralateral one, with no significant differences between them. Repeated assessment of all tests over all FU time points similarly showed lack of worsening hand function. Access-related adverse events included 19 harmless bleedings and 3 forearm radial artery and 3 distal radial artery occlusions. None affected hand function at FU.ConclusionsIn a systematic multidimensional assessment, DRA was not associated with hand function impairment. Moreover, DRA emerges as a safe alternative vascular access.  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