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   41593篇
  免费   3321篇
  国内免费   416篇
耳鼻咽喉   216篇
儿科学   614篇
妇产科学   761篇
基础医学   1307篇
口腔科学   626篇
临床医学   9543篇
内科学   3167篇
皮肤病学   221篇
神经病学   830篇
特种医学   544篇
外国民族医学   1篇
外科学   4179篇
综合类   6759篇
现状与发展   3篇
一般理论   3篇
预防医学   11004篇
眼科学   194篇
药学   3686篇
  120篇
中国医学   745篇
肿瘤学   807篇
  2024年   35篇
  2023年   832篇
  2022年   1325篇
  2021年   2051篇
  2020年   2619篇
  2019年   1622篇
  2018年   1531篇
  2017年   1551篇
  2016年   1609篇
  2015年   1618篇
  2014年   3842篇
  2013年   3502篇
  2012年   3169篇
  2011年   3157篇
  2010年   2611篇
  2009年   2160篇
  2008年   2182篇
  2007年   1899篇
  2006年   1726篇
  2005年   1309篇
  2004年   1100篇
  2003年   840篇
  2002年   583篇
  2001年   437篇
  2000年   361篇
  1999年   280篇
  1998年   267篇
  1997年   187篇
  1996年   158篇
  1995年   112篇
  1994年   101篇
  1993年   101篇
  1992年   64篇
  1991年   76篇
  1990年   37篇
  1989年   34篇
  1988年   33篇
  1987年   27篇
  1986年   23篇
  1985年   40篇
  1984年   26篇
  1983年   24篇
  1982年   15篇
  1981年   18篇
  1980年   14篇
  1979年   3篇
  1978年   7篇
  1977年   3篇
  1976年   2篇
  1972年   3篇
排序方式: 共有10000条查询结果,搜索用时 312 毫秒
71.
IntroductionEwing sarcoma (EWS) is a highly malignant tumor of bone and soft tissue that occasionally arises from viscera. Visceral EWS (V-EWS) is challenging to manage given its varied organ distribution and often late-stage presentation. We aimed to characterize our institutional experience with V-EWS, focusing on its surgical management, and to compare V-EWS outcomes against those with osseous (O-EWS) and soft tissue EWS (ST-EWS).MethodsRetrospective review of all EWS patients ≤21 years presenting to a single institution between 2000 and 2022. Patient- and disease-specific characteristics were compared. Overall and relapse-free survival were estimated using Kaplan Meier methods and log-rank test.Results156 EWS patients were identified: 117 O-EWS, 20 ST-EWS, and 19 V-EWS. V-EWS arose in the kidney (n = 5), lung (n = 5), intestine (n = 2), esophagus (n = 1), liver (n = 1), pancreas (n = 1), adrenal gland (n = 1), vagina (n = 1), brain (n = 1), and spinal cord (n = 1). No significant demographic differences were detected between EWS groups. V-EWS was more frequently metastatic at presentation (63.2%; p = 0.005), yet no significant overall or relapse-free survival differences emerged between EWS groups, with similar follow-up intervals. While V-EWS required multiple unique operative strategies to gain primary control, no significant difference in treatment strategies appeared between groups. Surgery-only primary control was associated with improved overall and relapse-free survival in all groups.ConclusionsV-EWS presents unique management challenges in children and adolescents given its variable sites of origin. This large cohort is the first to describe the surgical management and outcomes of V-EWS, demonstrating more frequent metastatic presentation, while achieving similar survival across groups.Level of evidenceLevel 2 – Cohort Study.  相似文献   
72.
73.
唐娇  胡霞  刘敏豪  邓肖云 《全科护理》2022,20(5):657-660
目的:探究SHEL模式下基层医院护理人员高警示药品安全管理培训的效果。方法:选取2020年7月—2021年6月在医院从事临床护理工作的80名护理人员,随机将其分为观察组与对照组各40人。对照组实施常规培训模式,观察组实施SHEL模式培训,比较两组护理人员高警示药品相关知识及技能掌握程度、意外事件发生率及核心能力。结果:培训后观察组护理人员理论及操作得分分别为(86.75±6.18)分及(93.19±4.28)分,核心能力得分为(228.98±8.37)分,均明显高于对照组(P<0.05),同时观察组护理人员在护理过程中出现给药前未双人核对、药品分类不清及交接记录不全的概率分别为0.95%、0.95%及1.90%,明显低于对照组(P<0.05),且未出现药物外渗及滴速有误等情况。结论:对基层医院护理人员实施SHEL模式下高警示药品安全管理培训,能够有效提高护理人员高警示药品理论、技能掌握程度及核心能力,同时有助于降低护理工作中意外事件的发生概率。  相似文献   
74.
75.
目的研究风险管理在儿科急诊护理工作中的应用。方法选取2021年10月至12月间来我科室就诊的100例患儿作为研究对象,将其分为研究组、对照组两组,每组各50例患儿。运用常规护理模式护理对照组患儿,运用风险管理模式,为研究组患儿给予护理干预,分析二组发生不良护理事故的情况并统计护理满意度。结果研究期间,研究组不良护理事件发生率为2.0%,对照组不良护理事件发生率为12.0%;研究组对护理工作的满意度为98.0%,对照组对护理工作的满意度为84.0%,P<0.05,组间差异具统计学意义。结论将风险管理应用于儿科急诊护理工作,可降低不良事件发生几率,保障患儿安全,具有推广应用价值。  相似文献   
76.
77.
ObjectivesIdentifying independent predictor factors of failure of ultra-fast track (UFT) extubation and to compare in-hospital outcomes with UFT extubation versus fast track (FT) extubation after cardiovascular surgery in adults.Material and methodsRetrospective analysis of 1,498 consecutive patients aged over 18 years-old undergoing cardiovascular surgery at a single institution. Between December 2014 and December 2016, FT extubation was used (N = 713) while, between December 2016 and December 2018, all patients were preoperatively considered suitable for UFT extubation (N = 785). In this instance, a standardized anaesthetic protocol was applied in all cases. The decision to not extubate in the operating room (OR) was based on intraoperative haemodynamic and ventilation.ResultsExtubation in the OR was possible in 699 (89%) patients. Significant independent predictors factors of UFT extubation failure were: preoperative NYHA class III-IV, myocardial infarction within two days prior to surgery, preoperative intra-aortic balloon counterpulsation, urgent/emergent surgery, intraoperative transfusion of platelets and intraoperative inotropic and vasopressor support. UFT extubation was associated with lower rates of cardiovascular complications such as congestive cardiac insufficiency (OR: 1,57; 95% CI: 1,13-2,19; P = 0,008) and new-onset postoperatory atrial fibrillation (OR: 1,40; 95% CI: 1,06-1,86; P = 0,020). Patient extubated in the OR presented lower risk of overall complications, shorter intensive care unit stay and higher short-term survival, although, no statistically significance was found when performing the multivariate adjustment.ConclusionsA routine immediate extubation in the OR following adult cardiovascular surgery is a feasible and safe practice, associated with low cardiovascular morbidity.  相似文献   
78.
ObjectiveTo develop a trail running injury screening instrument (TRISI) for utilisation as clinical decision aid in determining if a trail runner is at an increased risk for injury.DesignMultiple methods approach.MethodsThe study utilised five phases 1) identification of injury risk factors 2) determining the relevance of each identified risk factor in a trail running context, 3) creating the content of the Likert scale points from 0 to 4, 4) rescaling the Likert scale points to determine numerical values for the content of each Likert scale point, and 5) determining a weighted score for each injury risk factor that contributes to the overall combined composite score.ResultsOf the 77 identified injury risk factors, 26 were deemed relevant in trail running. The weighted score for each injury risk factor ranged from 2.21 to 5.53 with the highest calculated score being 5.53. The final TRISI includes risk categories of training, running equipment, demographics, previous injury, behavioural, psychological, nutrition, chronic disease, physiological, and biomechanical factors.ConclusionThe developed TRISI aims to assist the clinician during pre-race injury screening or during a training season to identify meaningful areas to target in designing injury risk management strategies and/or continuous health education.  相似文献   
79.
BackgroundThe dental treatment of individuals with intellectual disability can represent a considerable professional challenge.ObjectiveTo develop a model for predicting the behavior of patients with intellectual disability in the dental office.MethodsThe study group comprised 250 patients with Down syndrome (DS), autism spectrum disorder (ASD), cerebral palsy (CP), idiopathic cognitive impairment or rare disorders. We collected their demographic, medical, social and behavioral information and identified potential predictors (chi-squared test). We developed stratified models (Akaike information criterion) to anticipate the patients'behavior during intraoral examinations and to discern whether the dental treatment should be performed under general anesthesia. These models were validated in a new study group consisting of 80 patients. Goodness of fit was quantified with sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV) and area under the receiver operating characteristic curve (AUC). We developed a mathematical algorithm for executing the models and developed software for its practical implementation (PREdictors of BEhavior in Dentistry, “PREBED”).ResultsFor patients with DS, ASD and CP, the model predicting the need for physical restraint during examination achieved a PPV of 0.90, 0.85 and 1.00, respectively, and an NPV of 0.66, 0.76 and 1.00, respectively. The model predicting the need for performing treatment under general anesthesia achieved a PPV of 0.63, 1.00 and 1.00, respectively, and an NPV of 1.00, 1.00 and 0.73, respectively. However, when validating the stratified models, the percentage of poorly classified individuals (false negatives + false positives) ranged from 24% to 46.6%.ConclusionsThe results of the PREBED tool open the door to establishing new models implementing other potentially predictive variables.  相似文献   
80.
IntroductionIn advanced epithelial ovarian cancer (EOC), longer time-interval from surgery to initiation of adjuvant chemotherapy (TITC) is associated with decreased survival. Adding upper abdominal surgical procedures (UAP) increases rates of both complete gross resection and postoperative complications in EOC. Our objective was to investigate the association of UAP and TITC. Moreover, if specific postoperative monitoring after the most prevalent UAP increases early detection and management of complications.Material and methodsWomen diagnosed with EOC 2014–2016 in the Stockholm/Gotland Region in Sweden were identified in the Swedish Quality Registry for Gynaecologic Cancer. The association between UAP and TITC was investigated by multivariable linear regression and adjusted for predefined confounders. The follow-up and detection of postoperative complications after diaphragm resection, splenectomy and cholecystectomy was examined.Results240 women were selected for analysis. The TITC in women subjected to UAP was similar with a median of 30 days (p = 0.99). Moreover, despite a higher rate of postoperative and major complications (p < 0.001) and longer hospital stay (p < 0.001), in the adjusted analysis there was no association between UAP and prolonged TITC, with a mean difference of −2.27 days (95% Confidence Interval (CI), −5.99 to −1.45, p = 0.23). After the most prevalent UAP (diaphragm resection, splenectomy and cholecystectomy), eventual postoperative interventions were based on routine clinical management rather than procedure-specific postoperative surveillance.ConclusionUAP does not prolong TITC despite an increased rate of postoperative complications and longer length of hospital stay. Clinical non-specific surveillance is sufficient to detect postoperative complications after the most prevalent UAP.  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