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   62723篇
  免费   6631篇
  国内免费   1822篇
耳鼻咽喉   413篇
儿科学   1549篇
妇产科学   1391篇
基础医学   4364篇
口腔科学   1618篇
临床医学   7111篇
内科学   10265篇
皮肤病学   780篇
神经病学   3996篇
特种医学   981篇
外国民族医学   7篇
外科学   5801篇
综合类   9952篇
现状与发展   8篇
一般理论   1篇
预防医学   11102篇
眼科学   1114篇
药学   4346篇
  50篇
中国医学   1743篇
肿瘤学   4584篇
  2024年   265篇
  2023年   1240篇
  2022年   2605篇
  2021年   3411篇
  2020年   3239篇
  2019年   2388篇
  2018年   2370篇
  2017年   2447篇
  2016年   2778篇
  2015年   2514篇
  2014年   4724篇
  2013年   5211篇
  2012年   4342篇
  2011年   4406篇
  2010年   3419篇
  2009年   3075篇
  2008年   2943篇
  2007年   2879篇
  2006年   2504篇
  2005年   2176篇
  2004年   1746篇
  2003年   1504篇
  2002年   1281篇
  2001年   1106篇
  2000年   905篇
  1999年   722篇
  1998年   653篇
  1997年   588篇
  1996年   452篇
  1995年   429篇
  1994年   390篇
  1993年   301篇
  1992年   304篇
  1991年   289篇
  1990年   218篇
  1989年   195篇
  1988年   174篇
  1987年   131篇
  1986年   125篇
  1985年   143篇
  1984年   121篇
  1983年   74篇
  1982年   85篇
  1981年   67篇
  1980年   54篇
  1979年   48篇
  1978年   29篇
  1977年   24篇
  1976年   34篇
  1975年   20篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
论合理择医的制约因素及对策   总被引:2,自引:0,他引:2  
医学知识的高度专业性和医疗服务给的垄断性妨碍患者作出合理择医行为。欲通过患者的合理择医行为激发医疗服务的竞争机制,达到改进态度、提高质量、降低费用之目的,必须提高患者择医能力,适度放宽卫生服务市场的资源准入制度,大力培育医疗服务信息市场,推动医疗机构提供多种可替代性医疗服务。  相似文献   
102.
目的:分析脊髓损全国各地患者撑起动作实施过程中的相关影响因素。方法:采用撑起问卷表形式分析影响撑起动作完成的主要相关因素。结果:撑起动作正确完成受多种因素的影响,其中最主要的影响因素是重心的调查问题。结论:实施撑起动作时应分析相关影响因素再进行有针对性的训练。  相似文献   
103.
Mortality and morbidity of children received veno‐arterial extracorporeal membrane oxygenation (VA‐ECMO) support after cardiac surgery remain high despite remarkable advances in medical management and devices. The purpose of this study was to describe outcomes and risk factors of applying VA‐ECMO in the surgical pediatric population. We retrospectively analyzed 85 consecutive pediatric patients (aged <18 years) who received postcardiotomy VA‐ECMO from January 2010 to December 2018. Median (IQR) age at ECMO implantation in this cohort was 12.7 (6.4, 43.2) months, median weight was 8.5 (6.0, 12.8) kg, mean ECMO duration was 143.2 ± 81.6 hours and mean hospital length of stay was 48.4 ± 32.4 days. Seventy‐five patients (88.2%) were indicated for postcardiotomy cardiogenic shock. The successful ECMO weaning rate was 70.6% and in‐hospital mortality was 52.9%. The most common diagnosis was transposition of great arteries (n = 18, 21.2%), while acute kidney injury occurred most often (n = 64, 75.3%). Multivariate logistic regression analysis showed that thrombocytopenia, hemolysis, and nosocomial infection were positively correlated with in‐hospital mortality. Multivariate Cox proportional hazard regression analysis presented that thrombocytopenia significantly increased the 180‐day mortality in patients with successful weaning. Therefore, multiple factors had adverse effects on prognosis. Patient selection and procedures from ECMO implantation to weaning need to be closely monitored and performed in a timely manner to improve outcome.  相似文献   
104.
BackgroundIn the first year of dialysis, patients are vulnerable to cardiovascular disease (CVD) hospitalization, but knowledge regarding the risk factors and long-term outcomes of cardiovascular readmission within the first year after dialysis in incident continuous ambulatory peritoneal dialysis (CAPD) patients is limited.MethodsThis retrospective cohort study was conducted in incident CAPD patients. The demographic characteristics, laboratory parameters, and CVD readmission were collected and analyzed. The primary outcome was all-cause mortality, and the secondary outcomes included CVD mortality, infection-related mortality and technique failure. A logistic regression was used to identify the risk factors associated with CVD readmission within the first year after dialysis. Cox proportional hazards models were used to evaluate the association between CVD readmission and the outcomes.ResultsIn total, 1589 peritoneal dialysis (PD) patients were included in this study, of whom 120 (7.6%) patients had at least one episode of CVD readmission within the first year after dialysis initiation. Advanced age, CVD history, and a lower level of serum albumin were independently associated with CVD readmission. CVD readmission within the first year after dialysis was significantly associated with all-cause (HR 2.66, 95%CI 1.91–3.70, p < 0.001) and CVD (HR 3.42, 95%CI 2.20–5.31, p < 0.001) mortality, but not infection-related mortality or technique failure, after adjusting for confounders.ConclusionsOur findings suggest that an advanced age, a history of CVD, and a lower level of serum albumin were independently associated with CVD readmission. Moreover, CVD readmission was associated with all-cause and cardiovascular mortality in incident CAPD patients.  相似文献   
105.
Poor tendon to bone healing following rotator cuff repair has led to the continued interest and investigation into biological augmentation. The biology of tendinopathy is not fully understood and consequently the availability of disease modifying therapeutic targets is limited. A ceiling of benefit has been reached by mechanical optimisation of rotator cuff repair and thus, in order to improve healing rates, a biological solution is required. This review focuses on the strategies to biologically augment rotator cuff disorders with an emphasis on rotator cuff repair. Leucocyte rich platelet rich plasma has been shown to improve healing rates without clinically relevant improvements in outcome scores. Similarly, improved healing rates have also been reported with bone marrow stimulation and in long-term follow-up with bone marrow concentrate. Extracellular matrix (ECM) and synthetic scaffolds can increase healing through mechanical and or biological augmentation. A potential third category of scaffold is bio-inductive and has no mechanical support. Studies involving various scaffolds have shown promising results for augmentation of large to massive tears and is likely to be most beneficial when tendon quality is poor, however level I evidence is limited.  相似文献   
106.
107.
108.
109.
The buffering effect of social support on the negative effects of racism exposure on health outcomes has been mixed in prior studies regarding Asian Americans. Based on the stress-coping framework and using structural equation modelling (SEM) methods, we tested a theoretical model portraying simultaneous mediational paths from racism exposure to general physical and mental health through racism-related stress. Bootstrap analysis was used to test the indirect effects present in the model. Additionally, multi-group SEM analysis was conducted to investigate the moderation effect of social support from family and friends on the paths in the model. The sample consisted of 310 Asian American adults who completed an online survey. The results from the two-step SEM analysis and bootstrap analysis supported the theoretical model—racism exposure can simultaneously have a negative indirect effect on Asian Americans' physical and mental health via racism-related stress. Multi-group SEM analysis showed that there were no differences in model path coefficients based on having varying levels of social support from friends or family.  相似文献   
110.
This study investigated the risk of insomnia and hypnotics use among emergency physicians. This cross-sectional study recruited physicians working in Taiwanese hospitals in 2015 and the general population as the participants. Data from 1,097 emergency physicians obtained from the National Health Insurance Research Database were grouped into the case group, whereas 14,112 nonemergency physicians and 4,388 people from the general population were categorized into the control groups. This study used logistic regression and conditional logistic regression to compare the risks of insomnia between emergency and nonemergency physicians and between emergency physicians and the general population, respectively. The prevalence of insomnia among emergency physicians, nonemergency physicians and general population was 5.56%, 4.08%, and 1.73%, respectively. Compared with nonemergency physicians and the general population, emergency physicians had a significantly higher risk of insomnia. The proportions of emergency physicians, nonemergency physicians, and general population using hypnotics were 19.96%, 18.24%, and 13.26%, respectively. Among emergency physicians who used hypnotics, 49.77%, 25.57%, and 24.66% used only benzodiazepines, only nonbenzodiazepines, and both benzodiazepines and nonbenzodiazepines, respectively. Nonpharmacological interventions to improve insomnia and reminder of safe use of hypnotics to emergency physicians can serve as references for hospitals in developing health-promoting activities.  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