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   2617篇
  免费   222篇
  国内免费   72篇
耳鼻咽喉   12篇
儿科学   42篇
妇产科学   24篇
基础医学   202篇
口腔科学   133篇
临床医学   314篇
内科学   189篇
皮肤病学   21篇
神经病学   112篇
特种医学   63篇
外科学   156篇
综合类   537篇
预防医学   543篇
眼科学   22篇
药学   248篇
  5篇
中国医学   243篇
肿瘤学   45篇
  2024年   7篇
  2023年   55篇
  2022年   61篇
  2021年   102篇
  2020年   93篇
  2019年   78篇
  2018年   73篇
  2017年   82篇
  2016年   115篇
  2015年   92篇
  2014年   167篇
  2013年   162篇
  2012年   184篇
  2011年   200篇
  2010年   155篇
  2009年   150篇
  2008年   155篇
  2007年   150篇
  2006年   154篇
  2005年   111篇
  2004年   81篇
  2003年   81篇
  2002年   57篇
  2001年   53篇
  2000年   26篇
  1999年   38篇
  1998年   29篇
  1997年   23篇
  1996年   14篇
  1995年   16篇
  1994年   21篇
  1993年   12篇
  1992年   13篇
  1991年   13篇
  1990年   15篇
  1989年   11篇
  1988年   7篇
  1987年   7篇
  1986年   6篇
  1985年   6篇
  1984年   6篇
  1983年   3篇
  1982年   8篇
  1981年   6篇
  1980年   5篇
  1978年   2篇
  1977年   2篇
  1975年   1篇
  1974年   1篇
  1973年   1篇
排序方式: 共有2911条查询结果,搜索用时 187 毫秒
31.
Female, Wistar King A rats subjected to one day of isolated housing, during which all food was withheld for 22 hr and supplied for only 2 hr, and then given a single dose of Δ9-tetrahydrocannabinol (THC) markedly exhibited muricide and rod-attack behavior. This continued for 100 days after treatment as far as the animals remained in isolation. They displayed rat pup-killing behavior as well, although normal virgin female rats did not show such behavior. When the rats were transferred from isolated housing to group housing 60 days after THC treatment, rod-attack behavior disappeared completely in all rats and muricide disappeared in 13 of the 28 rats which exhibited muricide. However, when these rats were returned to isolation after a 15 day period of group housing, rod-attack behavior and muricide identical to that observed previously reappeared. It is concluded that housing condition plays a crucial role in the occurrence and maintenance of THC-induced aggression including muricide.  相似文献   
32.
目的分析综合护理对促进小儿手足口病病情恢复的效果观察。方法手足口病患儿作为本次研究的主要对象,总例数(选取人数)200例,患者收取时间在2018年10月-2019年10月,研究对象200例使用电脑随机分配方式分为两组,其中100例作为观察组(实施综合护理)、100例作为对照组(实施常规护理),将两组的口腔糜烂愈合时间、住院时间、皮疹消退时间、家属焦虑评分和抑郁评分进行比较。结果观察组手足口病患儿护理后口腔糜烂愈合时间、住院时间、皮疹消退时间显著优于对照组(P<0.05)。观察组患儿家属护理后焦虑(46.25±1.64)分、抑郁(52.03±1.21)分均低于对照组(P<0.05)。结论综合护理在小儿手足口病病情恢复中具有良好的护理效果。  相似文献   
33.
目的了解北京市东城区公共场所冷却塔使用及卫生状况,评估各场所冷却塔军团菌病健康风险。方法2018年5—9月,采集东城区内三类共26家公共场所冷却塔冷却水,填写相关调查问卷,通过冷却塔军团菌病健康风险指数模型计算各场所健康风险。结果本次研究中各场所冷却水样本嗜肺军团菌检测均为阴性,合格率为100%。游离性余氯平均为0.15 mg/L。酒店类场所冷却塔规模、加药方式和频率与其他场所有明显差别。26家公共场所健康综合风险平均为61.49,其中军团菌增殖风险、含菌气溶胶传播风险、暴露人群易感风险分别为16.13、22.66和22.70。不同场所冷却塔军团菌病健康风险评估结果存在一定差异,医院类场所健康风险指数高于酒店和商场(F=3.78,P<0.05)。结论冷却塔军团菌病健康风险高低主要受公共场所周围易感人群影响,该地区相关卫生部门应加强对相关易感人群的保护,对各类场所相关政策法规进行制定、完善和实施。  相似文献   
34.
BackgroundHealth literacy, the ability to access, understand, evaluate and apply health information, was found to contribute to positive health outcomes, possibly via promoting healthy behaviours. However, the specific pathways linking different health literacy skills to health and well‐being have remained unclear.MethodsA cross‐sectional survey with structural questionnaires was administered among 2236 adults in Hong Kong (mean age = 46.10 ± 19.05). Health literacy was measured by HLS‐Asian‐47. Participants'' physical conditions and subjective well‐being were predicted by health literacy and health behaviours with structural modelling path analysis.ResultsHealth literacy in finding and understanding information showed a direct effect on enhancing physical health, while applying information capacity had an indirect positive effect via promoting health behaviours, which was moderated by sex. Only among women, this indirect effect predicting fewer physical symptoms and better well‐being was significant.ConclusionsDifferent health literacy dimensions showed distinct direct and indirect pathways in influencing health for men and women. Based on the findings, skill trainings should be developed to enhance both gender''s abilities of finding and understanding health information, while the ability of applying health information should also be improved for modifying lifestyle and promoting health, particularly for women.Patient or Public ContributionTwo thousand and two hundred thirty‐six adults from different districts of Hong Kong participated in the study, and responded to questions on health literacy, behaviours and health status.  相似文献   
35.
高技术条件下战争的特殊性给战场救治带来了新的挑战。通过分析高技术条件下的战场救治的特点,提出了要圆满完成战场救治任务,军队医务人员必须承担的医德责任和应具备的身心素质。  相似文献   
36.
目的 调查研究海南省学生身体素质状况。方法 按《全国学生体质健康状况调查研究实施方案》所规定的测试方法和统计分析要求进行。结果 海南省学生身体素质六项指标基本随年龄增大而提高;男性学生、乡村学生、汉族学生大部分素质指标分别高于女性学生、城市学生及黎族学生;海南省学生1995年身体素质水平比1991年稍有下降。结论 应进一步加强我省学校尤其是少数民族地区学校的体育卫生工作。  相似文献   
37.
解脲支原体的生长条件研究   总被引:5,自引:0,他引:5  
目的 探讨解脲支原体 (Uu)在液体培养基中的最佳营养条件和在固体培养基上形成菌落的最佳气体条件。方法 采用不同的pH值、不同的酵母及小牛血清含量配制解脲支原体培养基 ,将法国Merieum生产的培养基作对比研究。结果 解脲支原体生长最适pH值为 6.0~ 6.5 ;10 %酵母提取液、10 %小牛血清能加速解脲支原体的生长 ,90 %N2 、5 %~ 10 %CO2 能促进解脲支原体菌落生长。结论 本研究为改进解脲支原体的培养质量、开发高效的支原体培养基及药敏检测板提供实验依据  相似文献   
38.
Living with a chronic or mental health condition can be challenging and requires considerable adjustment. As ways of coping are culturally influenced, it is important to understand how minority ethnic populations cope, to inform appropriate services. This review aimed to explore the coping strategies used by UK residents from an African Caribbean or Irish background between 1960 and 2020. A systematic literature search on strategies used to cope with chronic health conditions in both populations living in the United Kingdom identified 26 relevant studies. Data were extracted, quality of papers was appraised and critical interpretive synthesis was applied. Two major foci of the studies were coping strategies and barriers to coping. The main coping strategies were denial/scepticism, self-management, spirituality and religion. Within each population, there was variation in ways of coping. The review highlights the complex role of religion in influencing coping strategies. It demonstrates how personal and minority ethnic populations’ experiences of service use are connected with stigma, fear and mistrust, which also act as barriers to seeking help and to coping. Coping with a chronic or mental health condition in the Irish and African Caribbean populations is under-researched. Stigma, fear and mistrust in services act as key barriers to help-seeking and religion is a prominent coping strategy. However, few detailed examples were given on how it was used to assist individuals when managing a chronic or mental health condition. Also due to a lack of research, firm conclusions cannot be drawn for the Irish population.  相似文献   
39.
Examined direct and mediated relations between condition parametersand maternal mental health for 53 mothers of 2- to 11-year-oldchildren with juvenile rheumatoid arthritis (JRA). Multivariateanalyses revealed that when considered simultaneously, indicesof both biological severity and functional severity were associatedsignificantly with maternal mental health. Further, mother'sappraisals of the impact of the child's illness on the familypartially mediated the effects of medication type and child'sfunctional status on mother's mental health. Results providesupport for conceptual models that emphasize the cognitive mechanismsby which condition parameters such as biological and functionalseverity might affect maternal mental health. Explicating theprocesses by which a child's JRA might lead to psychologicaladjustment problems in the parent has implications for developingpreventive and treatment interventions.  相似文献   
40.
胃癌及其癌前病变中ras, c-erbB-2, p53癌基因产物的表达   总被引:10,自引:8,他引:2  
目的 探讨胃癌及其癌前病变中ras,c-erbB-2,p53癌基因蛋白产物的表达分布特点及其在胃癌发生发展中的作用。方法 应用免疫组化ABC方法,对58例胃癌、31例胃粘膜上皮异型增生和11例正常胃粘膜组织中,鼠抗人mAb ras基因p21蛋白、兔抗人c-erbB-2原癌基因产物多克隆抗体p185,鼠抗人mAb p53蛋白进行了检测。结果p21在正常胃粘膜和轻、中、重度异型增生和胃癌中的表达率分别为27.3%,30.0%,46.2%,75.0%和72.4%;其表达率在重度异型增生和胃癌中显著高于正常胃粘膜和轻、中度异型增生(P<0.05);p185在正常胃粘膜和轻、中度异型增生中无表达,在重度异型增生和癌中的阳性表达率分别为25.0%,18.9%,各组间无显著性差异(P>0.05);p53仅在癌中有表达,表达率29.3%,明显高于非癌组织(P<0.05)。胃癌中两种以上癌基因蛋白同时表达率明显高于非癌组织(P<0.05)。结论 ras基因可能作用于胃癌发生的早期阶段,c-erbB-2,p53基因可能作用于胃癌发生的较晚期。并认为胃癌发生需要多基因协同作用。  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