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   5355篇
  免费   242篇
  国内免费   28篇
耳鼻咽喉   47篇
儿科学   195篇
妇产科学   96篇
基础医学   227篇
口腔科学   195篇
临床医学   647篇
内科学   681篇
皮肤病学   61篇
神经病学   196篇
特种医学   77篇
外科学   325篇
综合类   596篇
预防医学   1628篇
眼科学   50篇
药学   406篇
  2篇
中国医学   76篇
肿瘤学   120篇
  2024年   5篇
  2023年   128篇
  2022年   229篇
  2021年   254篇
  2020年   206篇
  2019年   246篇
  2018年   229篇
  2017年   158篇
  2016年   124篇
  2015年   132篇
  2014年   426篇
  2013年   442篇
  2012年   373篇
  2011年   454篇
  2010年   360篇
  2009年   313篇
  2008年   289篇
  2007年   301篇
  2006年   212篇
  2005年   161篇
  2004年   115篇
  2003年   87篇
  2002年   53篇
  2001年   63篇
  2000年   40篇
  1999年   37篇
  1998年   22篇
  1997年   20篇
  1996年   25篇
  1995年   25篇
  1994年   11篇
  1993年   9篇
  1992年   7篇
  1991年   8篇
  1990年   8篇
  1989年   9篇
  1988年   9篇
  1987年   6篇
  1986年   5篇
  1985年   7篇
  1984年   3篇
  1983年   2篇
  1982年   4篇
  1981年   2篇
  1979年   1篇
  1977年   1篇
  1973年   2篇
  1969年   1篇
  1966年   1篇
排序方式: 共有5625条查询结果,搜索用时 15 毫秒
51.
Background: To evaluate gynecologic oncologists’ trends and attitudes towards the use of Minimally invasive surgery (MIS) in active period of the COVID-19 pandemic in Turkey. Methods: Online national survey sent to members of Turkish Endoscopy Platform consisting of six sections and 45 questions between the dates 1-15 June 2020 in Turkey to explore their surgical practice during the pandemic in three hospital types: Education and research hospital/university hospital, state hospital and private Hospital. Participants were gynecologic oncologists who are members of Turkish Endoscopy Platform. Results: Fifty-eight percent of participants canceled all operations except for cancer surgeries and emergent operations. About a quarter of participants (28%) continued to operate laparoscopically and/or robotically. For the evaluation of the suspected adnexial mass (SAM) 64% used laparotomy and only 13 % operated by laparoscopy (L/S). For the management of low-risk early-stage endometrial cancer only fifth of the participants preferred to perform L/S. For endometrial cancer with high-intermediate risk factors more than half of participants preferred complete staging with laparotomy. For advanced stage ovarian cancer, one-fifth of the participants preferred to perform an explorative laparotomy, whilst 15 % preferred diagnostic laparoscopy to triage the patients for either NACT or cytoreductive surgery. On the contrary 41 % of participants chose to have cytology by paracentesis for neo-adjuvant chemotherapy (NACT). Gynecologic oncologists with >10 years L/S experience used MIS more for SAM. Furthermore, experienced surgeons used L/S more for endometrial cancer patients. In busy COVID hospitals, more participants preferred laparotomy over L/S. Conclusion: Use of MIS decreased during the pandemic in Turkey. More experienced surgeons continued to perform MIS. Surgical treatment was the preferred approach for SAM, early-stage endometrial cancer.  However, NACT was more popular compared to radical surgery.  相似文献   
52.
[目的]探讨某市农民工健康现状,为制定提高农民工健康水平的相应策略和措施提供依据。[方法]通过对420名外出农民工进行生活行为方式调查和较全面的体格检查,获取身高、体重、血压、乙肝表面抗原、肝功能、HIV抗体、梅毒抗体等各项指标,并对相关资料进行统计分析。[结果]农民工合理膳食率11.7%、体育锻炼率0、健康知识知晓率7.38%,均处于较低水平;农民工吸烟率53.3%、饮酒率37.4%、乙肝表面抗原阳性率18.1%、梅毒抗体阳性率2.9%、活动性肺结核检出率1.2%,高于我国人群平均水平;农民工高血压检出率14.1%;超重或肥胖率20.2%。[结论农民工的健康水平较低,同时面临传染性疾病和慢性非传染性疾病的双重威协,提高农民工健康水平是一件迫在眉睫的工作。  相似文献   
53.
目的了解某高校教师在生活方式上存在的问题,为高校教师预防疾病,制定健康干预措施提供依据。方法采取不良生活方式问卷,对某高校239名教师进行问卷调查并分析。结果对生活方式对健康的影响缺乏认识者占35.15%;膳食不平衡者占53.39%,很少吃或不吃早餐者占15.48%;吸烟者占12.55%,经常大量饮酒者占8.79%,两种嗜好均有者占7.53%;基本不锻炼或偶尔锻炼者占79.07%;每天睡眠时间〈6h者占15.48%,面临家庭问题者占52.77%;有健忘、注意力下降、失眠等心理不良主诉者较多。结论高校教师不良生活方式较为普遍,应引起高度重视,采取综合措施,改变不良的生活方式。  相似文献   
54.
2006年贵州省城乡社区居民健康知识调查   总被引:1,自引:0,他引:1  
目的通过基础调查,了解城、乡居民的健康知识情况,为传播健康教育核心信息提供依据。方法城、乡试点社区中分别随机调查300人。结果调查的健康知识中,除了多吃保健品一项农村高于城市外,其余均为城市高于农村。艾滋病三条传播途径的知晓率农村不到城市的一半;总吸烟率为41.7%,其中男性吸烟率为70.0%,在吸烟及饮酒方面,城、乡无差别。结论无论城、乡,都需要开展健康生活方式的知识传播;在农村,艾滋病知识的宣传上更需加大力度。  相似文献   
55.

Background

Biological measurements have been employed as useful biomarkers for exposure. Because of its property of reflecting toxicokinetic differences, however, within-subject variability leads to biased results in epidemiologic studies.

Method

We examined the variability of lead (Pb), mercury (Hg), and cadmium (Cd) levels in blood samples from 1429 participants among 1677 elderly individuals aged over 60 years who lived in an urban area from August 2008 to April 2015.

Results

The geometric means of blood Pb, Hg, Cd were 1.92 μg/dL, 2.48 μg/L, and 1.33 μg/L, and the intra-class correlations (ICCs) were 0.81, 0.71, and 0.83, respectively. The mean values of Pb and Hg levels in this study were lower than the results from single spot samples in other national biomonitoring surveys in Korea, with the exception of Cd was higher than those in other studies. Moreover, the predicted exceedances over the guidance levels for Pb, Hg, and Cd were 1.9%, 4.2%, and 0.3%, respectively.

Conclusion

Korean elderly were exposed to high levels of Pb, Hg and Cd. Especially, those who had high levels of Cd were continuously exposed to Cd during study period with the 6 collection intervals. Therefore, factors affecting environmental Cd exposure should be further studied in the future.  相似文献   
56.
目的了解我市个体诊所医护人员手卫生知识掌握情况及洗手执行情况,寻找存在的问题,提出管理对策。方法采用问卷调查的方法,对L16家个体诊所医护人员进行手卫生知识、洗手指征、影响洗手的原因等进行调查,同时实地察看各诊所的洗手设施及医护人员的洗手行为。结果医护人员对洗手的重要性的认知率最高,为73.7%,对《医务人员手卫生规范》的认知率最低,为26.2%:接触患者血液、体液、分泌物之后的洗手率最高,为100%,接触患者周围环境和物品后的洗手率最低,为14.3%;影响洗手的主要原因是思想上不重视,认为洗不洗手关系不大,所占比例为75.6%,少数人是因工作忙忽视手的卫生或洗手设施不足所致。结论我市个体诊所医务人员存在的主要问题是对手卫生的重要性认识不足,洗手执行率低。必须加强专项培训,减少医院感染。  相似文献   
57.
This paper illustrates how validation data can be used to correct for errors in survey indicators of psychiatric disorders in models where the outcome of interest is the probability of a positive diagnosis. Nonlinear models of the risks associated with a broad range of sociodemographic factors for three disorders (major depression, alcohol and drug use disorders) are estimated with adjustments for classification errors in the survey diagnoses. Estimates show that inferences drawn from the unadjusted models may seriously understate gender and regional differences in the prevalence rates of all three disorders, the effects of education and ethnicity on the development of alcohol use disorders, and the relationship between marital status and the risk of major depression.  相似文献   
58.
目的了解儿童计划免疫现状,为加强计划免疫工作,有效提高接种质量提供依据。方法采取分层随机抽样的方法在全市11个县区每县区抽查4个行政村和1个农贸市场,每村场调查10~30名规定范围的儿童。连续3年。结果BCG、OPV、DPT、MV四苗全程接种率在2003、2004、2005年调查中分别为65.20%、75.54%、91.73%;各单苗接种率由2003年的不足85%提高到2005年的95%;建卡率、建证率和卡疤率也提高到90%以上。结论数据显示,三年来,儿童计划免疫状况得到了改善,各指标逐年提高,到2005年都达到了或接近了90%,但还存在不足。  相似文献   
59.
[目的]对留学生医学中文课程进行评价。[方法]对完成医学中文课程的75名医学留学生进行问卷调查。[结果]医学留学生认为医学中文课程设置合理、教学效果好、实现了教学目标、课程具有实用性;对教材和教师的授课过程的评价较高。[结论]医学中文课程设置在留学生进入临床前能促进留学生掌握医学知识并实现教学的目标,抓好教学过程能提高课程的教学效果。  相似文献   
60.
Objectives: To determine the relationship between functional status and health problems, age and co-morbidity in primary care patients. Methods: Patients from 60 general practitioners who visited their general practitioner were recruited and asked to complete a written questionnaire, including a list of 25 health problems and the SF-36 to measure functional status. The response rate was 67% (n = 4112). Differences between subgroups were tested with p < 0.01. Results: Poorer functional status which was associated with increased age (except for vitality) and increased co-morbidity. Patients with asthma/bronchitis/COPD, severe heart disease/infarction, chronic backpain, arthrosis of knees, hips or hands, or an ‘other disease’ had poorer scores on at least five dimensions of functional status. Patients with hypertension, diabetes mellitus or cancer did not differ from patients without these conditions on more than one dimension of functional status. In the multiple regression analysis age, had a negative effect on functional status (standardised β-coefficients between −0.03 and −0.34) except for vitality. Co-morbidity had a negative effect on physical role constraints (−0.15) and bodily pain (−0.09). All health problems had effects on dimensions of functional status (coefficients between −0.04 and −0.13). General health and physical dimensions of functional status were better predicted by health problems, age and co-morbidity (between 6.4 and 16.5% of variation explained) than mental dimensions of functional status (between 1.1 and 3.2%). Conclusion: Higher age was a predictor of poorer functional status, but there was little evidence for an independent effect of co-morbidity on functional status. Health problems had differential impact on functional status among primary care patients. This revised version was published online in June 2006 with corrections to the Cover Date.  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