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   242968篇
  免费   11617篇
  国内免费   556篇
耳鼻咽喉   3186篇
儿科学   7724篇
妇产科学   4949篇
基础医学   34601篇
口腔科学   5831篇
临床医学   19486篇
内科学   53455篇
皮肤病学   6508篇
神经病学   21580篇
特种医学   7622篇
外国民族医学   104篇
外科学   30058篇
综合类   1286篇
一般理论   67篇
预防医学   21951篇
眼科学   4718篇
药学   16883篇
  4篇
中国医学   801篇
肿瘤学   14327篇
  2023年   1335篇
  2022年   1077篇
  2021年   3815篇
  2020年   2289篇
  2019年   4135篇
  2018年   7684篇
  2017年   5100篇
  2016年   5088篇
  2015年   5727篇
  2014年   6120篇
  2013年   9622篇
  2012年   16451篇
  2011年   16407篇
  2010年   8299篇
  2009年   6300篇
  2008年   14015篇
  2007年   15090篇
  2006年   13860篇
  2005年   13745篇
  2004年   12899篇
  2003年   11805篇
  2002年   11109篇
  2001年   6352篇
  2000年   6394篇
  1999年   5696篇
  1998年   1085篇
  1997年   897篇
  1996年   827篇
  1995年   744篇
  1992年   3305篇
  1991年   2966篇
  1990年   2832篇
  1989年   2594篇
  1988年   2475篇
  1987年   2271篇
  1986年   2162篇
  1985年   1939篇
  1984年   1462篇
  1983年   1233篇
  1979年   1253篇
  1978年   893篇
  1977年   839篇
  1975年   843篇
  1974年   1021篇
  1973年   1041篇
  1972年   962篇
  1971年   958篇
  1970年   891篇
  1969年   928篇
  1968年   797篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
61.
62.
63.

Aim

The purpose of this study is to find out whether telephone referral from Primary Health Care to Internal Medicine Consult manages to reduce waiting days as compared to traditional referral. This study also aims to know how acceptable is the telephone referral to general practitioners and their patients.

Design

No blind randomized controlled clinical trial.

Setting

Northern Huelva Health District.

Participants

154 patients.

Interventions

Patients referrals from intervention clinicians were sent via telephone consultation, whereas patients referrals from control clinicians were sent by traditional via.

Measurements

Number of days from referral request to Internal Medicine Consult. Number of telephone and traditional referrals. Number of doctors and patients denied. Denial reasons.

Results

A statistically significant difference was found between groups, with an average of 27 (21-34) days. Among General Practitioners, 8 of the first 58 total doctors after randomization and, subsequently, 6 of the 20 doctors of the test group refused to engage in the trial because they considered “excessive time and effort consuming”. 50% of patients referred by the 14 General Practitioners finally randomized to the intervention group were denied referral by telephone due to patient's complexity.

Conclusions

Telephone referral significantly reduces waiting days for Internal Medicine consult. This type of referral did not mean an “excessive time and effort consuming” to General Practitioners and was not all that beneficial to complex patients  相似文献   
64.
65.
Peacekeeping missions involve experiences that may impact the mental health of participating soldiers. However, research on the long-term mental health consequences of peacekeeping is sparse. The present study aimed to find the prevalence of mental health problems (MHPs), possible MHP predictors, and associations between predictors and MHPs in Norwegian peacekeepers 18–38 years after deployment to a United Nations peacekeeping mission. We used data from a cross-sectional, postdeployment survey of Norwegian peacekeepers who served in Lebanon between 1978 and 1998 (N = 10,605). Participants were assessed for posttraumatic stress disorder (PTSD); anxiety; depression; insomnia; alcohol misuse; drug misuse; and exposure to pre-, peri-, and postdeployment stressors. Logistic regressions were executed to explore key variables associated with MHPs. Total MHP prevalence was 15.1%, 95% CI [14.4, 15.8]. The estimates for specific disorders were 0.1% for drug misuse, 3.4% for alcohol misuse, 4.0% for depression, 6.2% for PTSD, 6.4% for anxiety, and 9.3% for insomnia. Postdeployment stressors, OR = 1.91, 95% CI [1.79, 2.04]; employment status, OR = 1.41, 95% CI [1.33, 1.48]; and traumatic exposure during deployment, OR = 1.11, 95% CI [1.09, 1.12], were positively related to PTSD, χ2(17, N = 8,568) = 1,791.299, p < .001. Similar patterns were found for the other MHPs. Considering that most participants (84.9%) reported low symptom levels, our findings challenge the widespread public perception that most peacekeepers have MHPs. Moreover, our results indicate that future peacekeepers should be prepared for challenges they may face not only during deployment but also in the years following their homecoming.  相似文献   
66.
67.
68.
69.

Objective

To explore from a gender perspective the association with subjective health of the interaction between education and household arrangements within the framework of social determinants of health placed at the micro and mezzo levels.

Methods

The data comes from the Spanish sample of the European Union Statistics on Income and Living Conditions for 2014. Independent logistic regression models for men and women were run to analyze the association with subjective health of the interaction between education and household arrangements. An additive model was run to assess possible advantages over the interaction approach.

Results

The interaction models show a lower or even no significant effect on health of household arrangements usually negatively associated with health among individuals with high education, displaying specific patterns according to sex.

Conclusions

Health profiles of women and men are more precisely drawn if both social determinants of health are combined. Among the women, the important role was confirmed of both social determinants of health in understanding their health inequalities. Among the men, mainly those with low educational achievement, the interaction revealed that the household was a more meaningful social determinant of health. This could enable the definition of more efficient public policies to reduce health and gender inequalities.  相似文献   
70.
Conservation Genetics Resources - Fifteen polymorphic microsatellite markers were developed for Tridacna maxima in order to assess self-recruitment and larval dispersal within and among MPAs in New...  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