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   97937篇
  免费   5019篇
  国内免费   1962篇
耳鼻咽喉   532篇
儿科学   2170篇
妇产科学   1389篇
基础医学   7922篇
口腔科学   2243篇
临床医学   7635篇
内科学   17295篇
皮肤病学   855篇
神经病学   5540篇
特种医学   1916篇
外国民族医学   6篇
外科学   11830篇
综合类   13302篇
现状与发展   1篇
一般理论   6篇
预防医学   9180篇
眼科学   1245篇
药学   9024篇
  143篇
中国医学   9699篇
肿瘤学   2985篇
  2023年   1577篇
  2022年   2609篇
  2021年   3898篇
  2020年   3271篇
  2019年   5168篇
  2018年   4197篇
  2017年   3442篇
  2016年   2489篇
  2015年   2237篇
  2014年   5092篇
  2013年   4605篇
  2012年   4477篇
  2011年   5447篇
  2010年   4705篇
  2009年   3654篇
  2008年   3451篇
  2007年   3569篇
  2006年   3178篇
  2005年   2643篇
  2004年   2107篇
  2003年   1900篇
  2002年   1352篇
  2001年   1162篇
  2000年   979篇
  1999年   865篇
  1998年   704篇
  1997年   652篇
  1996年   546篇
  1995年   589篇
  1994年   558篇
  1993年   429篇
  1992年   429篇
  1991年   367篇
  1990年   306篇
  1989年   305篇
  1988年   288篇
  1986年   251篇
  1985年   1818篇
  1984年   2802篇
  1983年   2544篇
  1982年   2002篇
  1981年   2092篇
  1980年   1761篇
  1979年   1563篇
  1978年   1346篇
  1977年   857篇
  1976年   1245篇
  1975年   1051篇
  1974年   884篇
  1973年   831篇
排序方式: 共有10000条查询结果,搜索用时 750 毫秒
91.
目的探讨专科护士-社区护士-个体-家庭四方联动防跌护理模式在社区跌倒高危老年人中的应用与效果。方法选取深圳市龙岗区的2个社区,随机分为观察组和对照组,从两个社区登记建档的跌倒高风险老年居民中分别随机抽选45名进行干预。观察组采用"专科护士-社区护士-个体-家庭"四方联动推进的综合干预方案。对照组接受社区防跌倒常规护理。于干预前及干预后12个月使用修订版社区老年人跌倒危险评估量表、步态和平衡测试量表对两组老年人进行评测,记录两组1年内跌倒发生例次。结果干预期间跌倒发生情况:观察组1人次,对照组6人次。观察组步态和平衡测试得分提高,跌倒危险评估表得分降低,与对照组比较,差异有统计学意义(均P0.01)。结论四方联动的综合干预方案应用于社区居家老年人,能有效降低老年人跌倒风险,提升其防跌能力,对预防社区老年人跌倒的发生有积极作用。  相似文献   
92.
Abstract

This research explores how the level of consumers’ need for cognition (NFC) is associated with celebrity endorser credibility and examines its effects on advertising-related attitudes. A 3 (endorser types: actor/actress, athlete, TV personality/talent) × 2 (endorser’s gender) factorial experiment with 435 Japanese consumers was conducted. Concerning Japanese OTC drug advertising, lower NFC individuals perceived celebrity endorsers as more credible in comparison to higher NFC individuals. The main effects of NFC and endorser type on endorser credibility existed; however, no interaction between the two variables was found. The endorser type had an influence on attitudes toward ads and the advertised brand.  相似文献   
93.
目的研究地中海贫血孕妇实施产科综合护理模式的护理配合措施及效果。方法选择78例于我院检查地中海贫血孕妇,纳入时间为2017年5月-2018年5月,采用随机数字表法将其分为综合护理组与对照组,每组均39例。其中对照组采用常规护理形式,综合护理组行产科综合护理模式,对比综合护理组与对照组护理前后心理状态评估指标及家属的护理满意度。结果护理前综合护理组与对照组患者心理状态评估指标差异无统计学意义(P>0.05),与对照组(76.92%)相比,护理后综合护理组焦虑指标、抑郁指标更低,综合护理组孕妇及家属的护理满意度(94.87%)较高(P<0.05)。结论通过综合护理模式可提升地中海贫血孕妇护理满意度,并改善其心理状态。  相似文献   
94.
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   
95.
消化道术后胃肠功能紊乱影响着患者们的生活质量。张立平教授认为术后胃肠功能紊乱,证属本虚标实,临床治疗当从调理中焦-脾胃肝为切入点,强调"脾胃为本""中焦一体"的治疗思路,总结出脾胃虚弱、肝郁脾虚两个证型,临证时以培土达木为基本治疗原则,辨证论治,临床疗效显著。  相似文献   
96.
ObjectiveProgrammed death ligand 1 (PD-L1) has been reported to be connected to prognosis in individuals with malignant pleural mesothelioma (MPM), although there is no consensus based on data from previous studies. Accordingly, this quantitative meta-analysis investigated prognostic and clinicopathological utility of PD-L1 in patients with MPM.MethodsA comprehensive search of the PubMed, Web of Science, Embase, and Cochrane Library databases for articles published up to October 4, 2019 was performed. Studies using immunohistochemical techniques to detect/quantify the expression of PD-L1 in MPM tissue were enrolled in the analysis. The combined hazard ratio (HR) and corresponding 95% confidence interval (CI) was applied to assess the association between PD-L1 expression and overall survival (OS).ResultsA total of 11 studies comprising 1606 patients was included in the present meta-analysis. For OS, pooled data revealed an HR of 1.50 (95% CI 1.32–1.70; p < 0.001), suggesting that patients with PD-L1 overexpression experience inferior OS. Subgroup analysis revealed that elevated PD-L1 remained a significant prognostic indicator for worse OS, irrespective of sample size, cut-off value, ethnicity, and Newcastle-Ottawa Scale score. Moreover, PD-L1 overexpression was associated with non-epithelioid histology (odds ratio 4.30 [95% CI 1.89–9.74]; p < 0.001).ConclusionsResults of this meta-analysis show that elevated expression of PD-L1 could be a factor predicting poorer survival in patients with MPM.  相似文献   
97.
王青  杨玉莹  吴显文 《河南中医》2020,40(3):356-359
导致血不利的原因一是不足,即由于气、血、津、液等物质的缺乏致无源行血;一是不通,即水、湿、痰、饮、瘀、食积、火郁、内风、外伤等病理因素阻滞,致血行不畅。血瘀经脉之内,则水亦瘀积脉中,致脉络胀满,形成水肿。乳腺癌术后患者,金刃本已损伤血脉,术后的放疗、化疗又属祛邪之法,故机体元气受损,气虚无力行血,血运行不畅,导致患侧上肢水肿。故治疗乳腺癌相关淋巴水肿时,应当血水同治,即活血利水之法要贯穿始终。先病血而后病水者,可以活血化瘀为主,利水为辅;先病水后病血者,则以利水消肿为主,酌加活血养血之品。但需要注意的是:①临证时切不可拘泥于单纯的活血利水法,而忽视乳腺癌相关淋巴水肿(breast cancer related lymphedema,BCRL)患者机体本身的状况。②临证勿忽视五脏与血、水的关系,以及肺、脾、肾、三焦与水肿的内在关系。③可多种方法联合运用,审证求因,标本同治。BCRL术后宜补气活血,通脉利水;术后兼化疗者可疏肝健脾、利水消肿;早期可在活血利水基础上,侧重利湿消肿,后期多湿聚为痰,治疗侧重化痰软坚。  相似文献   
98.
99.
100.
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