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   213298篇
  免费   17247篇
  国内免费   5387篇
耳鼻咽喉   2011篇
儿科学   9178篇
妇产科学   4948篇
基础医学   20144篇
口腔科学   6947篇
临床医学   21561篇
内科学   31502篇
皮肤病学   4213篇
神经病学   16979篇
特种医学   4881篇
外国民族医学   26篇
外科学   20511篇
综合类   33188篇
现状与发展   27篇
一般理论   4篇
预防医学   12907篇
眼科学   3813篇
药学   14892篇
  206篇
中国医学   19578篇
肿瘤学   8416篇
  2024年   446篇
  2023年   3487篇
  2022年   5562篇
  2021年   9476篇
  2020年   9245篇
  2019年   7291篇
  2018年   7164篇
  2017年   7592篇
  2016年   8027篇
  2015年   7594篇
  2014年   14711篇
  2013年   17366篇
  2012年   12898篇
  2011年   14532篇
  2010年   11752篇
  2009年   10825篇
  2008年   10201篇
  2007年   10539篇
  2006年   9495篇
  2005年   8004篇
  2004年   6783篇
  2003年   5894篇
  2002年   4438篇
  2001年   3813篇
  2000年   3308篇
  1999年   2847篇
  1998年   2392篇
  1997年   2243篇
  1996年   2055篇
  1995年   1905篇
  1994年   1703篇
  1993年   1500篇
  1992年   1299篇
  1991年   1080篇
  1990年   921篇
  1989年   841篇
  1988年   795篇
  1987年   714篇
  1986年   641篇
  1985年   843篇
  1984年   677篇
  1983年   438篇
  1982年   548篇
  1981年   476篇
  1980年   393篇
  1979年   342篇
  1978年   208篇
  1977年   177篇
  1976年   141篇
  1975年   69篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
42.
  1. Download : Download high-res image (232KB)
  2. Download : Download full-size image
  相似文献   
43.
ObjectiveProstate cancer (PCa) is the second most common solid tumor in men and the fifth leading cause of cancer-related death. In advanced stage, palliative treatments are used instead of curative therapies. Therefore, finding predictive indicators seems crucial. Patients with castration-resistant prostate cancer (CRPC) that received Dx chemotherapy have been retrospectively reviewed. The aim of this study was to investigate whether docetaxel (Dx)-free interval could have a predictive value for PCa and influence other sequential therapies.Material and methodsThis clinical trial study was performed on 104 patients at Medeniyet University Oncology Clinic in 2018-2020. All CRPC patients had metastases, received Dx as first-line treatment and underwent androgen receptor axis targeted (ARAT) therapy after disease progression. We analyzed patients’ progression time after Dx therapy and the effects on sequential treatment.ResultsAfter Dx therapy, all patients received ARAT (abiraterone (ABI) n: 49 (47.1%) and enzalutamide (ENZ) n: 54 (51.9%)) as a second-line treatment, except for one patient who received cabazitaxel. There was a statistically significant relationship between the Dx-free interval and duration of response to ARAT (P<.001). The response time of ARAT treatment was <10.5 months in all patients whose Dx-free interval period was <9 months.ConclusionsOur findings support the theory that Dx-free interval can be a predictive factor for CRPC. CRPC disease can be classified as Dx-sensitive disease or Dx-resistance disease, based on the Dx-free interval. Decision on subsequent treatments could be made considering this information.  相似文献   
44.
目的 探讨模拟诊疗在留学生心血管内科实习带教中的应用效果。方法 将35名留学生随机编号,分成试验组和对照组。试验组18名学生分成3组(每组6名)进行模拟诊疗教学,对照组17名学生进行常规实习。通过填写评价单和相关的临床能力测试对两组教学效果进行评价。选用SPSS 19.0软件进行t检验。结果 参与模拟诊疗教学的留学生均希望在各科实习中多采用此方法。在临床能力测试方面,试验组学生在病史采集[(22.16±2.17)vs.(20.33±2.03)]、体格检查[(23.05±1.79)vs.(19.78±2.05)]及回答问题[(23.50±1.47)vs.(19.56±1.92)]方面均优于对照组,差异有统计学意义(P<0.05)。但是在病历书写方面,两组差异无统计学意义(P>0.05)。结论 利用高仿真的模拟诊疗教学手段,弥补了留学生在实习期间不能充分接触患者的缺陷,有助于提高其临床操作技能、增强医患沟通能力等医学职业素养。  相似文献   
45.
Transcranial magnetic stimulation (TMS) may offer a reliable means to characterize significant pathophysiologic and neurochemical aspects of restless legs syndrome (RLS). Namely, TMS has revealed specific patterns of changes in cortical excitability and plasticity, in particular dysfunctional inhibitory mechanisms and sensorimotor integration, which are thought to be part of the pathophysiological mechanisms of RLS rather than reflect a non-specific consequence of sleep architecture alteration.If delivered repetitively, TMS is able to transiently modulate the neural activity of the stimulated and connected areas. Some studies have begun to therapeutically use repetitive TMS (rTMS) to improve sensory and motor disturbances in RLS. High-frequency rTMS applied over the primary motor cortex or the supplementary motor cortex, as well as low-frequency rTMS over the primary somatosensory cortex, seem to have transient beneficial effects. However, further studies with larger patient samples, repeated sessions, an optimized rTMS setup, and clinical follow-up are needed in order to corroborate preliminary results.Thus, we performed a systematic search of all the studies that have used TMS and rTMS techniques in patients with RLS.  相似文献   
46.
This paper describes country-wide special measures undertaken for interventional radiology staff during the current coronavirus disease 2019 (COVID-19) pandemic. Although each interventional radiology service around the world faces unique challenges, the principles outlined in this article will be useful when designing or strengthening individual practices and integrating them within wider hospital and national measures. Moving beyond the current outbreak, these measures will be useful for any future infectious diseases which are likely to arise.  相似文献   
47.
48.
49.
BackgroundMetabolic syndrome (MetS) is related to the increased risk of major cardiovascular diseases (CVD). The link between high serum total bilirubin (TBL) is cross-sectionally related to MetS and its components. However, whether serum TBL predicts incidence of MetS and its components remains inconclusive.MethodsThe present study included 893 women aged 70 ± 9 years from a rural village. We examined the relationship between serum TBL and MetS based on the modified criteria of the National Cholesterol Education Program's Adult Treatment Panel (NCEP-ATP) III report in a cross-sectional (N = 893) and cohort (N = 288) data.ResultsIn the cross-sectional study, serum TBL (β = 0.536, p < 0.001) as well as age, alcohol consumption, exercise habits, history of CVD, SUA, GGT, and ALT was significantly and dependently associated with number of MetS components, but in the cohort study serum TBL was not associated with number of MetS components. Compared with the 1st tertile of serum TBL (0.20–0.55 mg/dL), multivariate-adjusted odds ratio (95% confidence interval) for the 2nd -3rd tertiles of serum TBL (0.54–2.00 mg/dL) was 0.70 (0.51–0.95) in the cross-sectional study and 0.41 (0.21–0.81) in the cohort study.ConclusionsOur data demonstrated an independently negative association between serum TBL and MetS in Japanese community-dwelling women.  相似文献   
50.
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