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   22080篇
  免费   1676篇
  国内免费   46篇
耳鼻咽喉   203篇
儿科学   730篇
妇产科学   645篇
基础医学   2763篇
口腔科学   259篇
临床医学   3258篇
内科学   4054篇
皮肤病学   347篇
神经病学   2121篇
特种医学   437篇
外科学   2438篇
综合类   203篇
一般理论   49篇
预防医学   2819篇
眼科学   294篇
药学   1466篇
  1篇
中国医学   29篇
肿瘤学   1686篇
  2024年   5篇
  2023年   243篇
  2022年   145篇
  2021年   771篇
  2020年   536篇
  2019年   851篇
  2018年   902篇
  2017年   686篇
  2016年   666篇
  2015年   773篇
  2014年   1016篇
  2013年   1378篇
  2012年   2003篇
  2011年   1973篇
  2010年   1078篇
  2009年   871篇
  2008年   1526篇
  2007年   1553篇
  2006年   1363篇
  2005年   1360篇
  2004年   1187篇
  2003年   1017篇
  2002年   914篇
  2001年   113篇
  2000年   66篇
  1999年   98篇
  1998年   135篇
  1997年   101篇
  1996年   84篇
  1995年   59篇
  1994年   48篇
  1993年   58篇
  1992年   26篇
  1991年   32篇
  1990年   19篇
  1989年   18篇
  1988年   13篇
  1987年   18篇
  1986年   19篇
  1985年   17篇
  1984年   14篇
  1983年   10篇
  1982年   9篇
  1981年   7篇
  1980年   5篇
  1979年   2篇
  1978年   2篇
  1977年   2篇
  1969年   2篇
  1927年   1篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
5.
6.
Die Anaesthesiologie - Die COVID-19-Pandemie hat das deutsche Gesundheitssystem vor enorme Herausforderungen gestellt und den Bedarf an Strategien zu Rekrutierung, Schulung und Einsatzplanung von...  相似文献   
7.

Objective

To examine the experience of interracial anxiety among health professionals and how it may affect the quality of their interactions with patients from racially marginalized populations. We explored the influence of prior interracial exposure—specifically through childhood neighborhoods, college student bodies, and friend groups—on interracial anxiety among medical students and residents. We also examined whether levels of interracial anxiety change from medical school through residency.

Data Source

Web-based longitudinal survey data from the Medical Student Cognitive Habits and Growth Evaluation Study.

Study Design

We used a retrospective longitudinal design with four observations for each trainee. The study population consisted of non-Black US medical trainees surveyed in their 1st and 4th years of medical school and 2nd and 3rd years of residency. Mixed effects longitudinal models were used to assess predictors of interracial anxiety and assess changes in interracial anxiety scores over time.

Principal Findings

In total, 3155 non-Black medical trainees were followed for 7 years. Seventy-eight percent grew up in predominantly White neighborhoods. Living in predominantly White neighborhoods and having less racially diverse friends were associated with higher levels of interracial anxiety among medical trainees. Trainees' interracial anxiety scores did not substantially change over time; interracial anxiety was highest in the 1st year of medical school, lowest in the 4th year, and increased slightly during residency.

Conclusions

Neighborhood and friend group composition had independent effects on interracial anxiety, indicating that premedical racial socialization may affect medical trainees' preparedness to interact effectively with diverse patient populations. Additionally, the lack of substantial change in interracial anxiety throughout medical training suggests the importance of providing curricular tools and structure (e.g., instituting interracial cooperative learning activities) to foster the development of healthy interracial relationships.  相似文献   
8.
9.

Context

In the era of effective antiretroviral therapy, persons living with HIV/AIDS (PLWHA) are living longer, transforming HIV from a universally fatal disease to a serious chronic illness, warranting discussions between patients and their loved ones about advance care planning (ACP). Evidence is needed on factors associated with patients' likelihood to discuss ACP with loved ones.

Objectives

To further characterize factors associated with successful ACP in PLWHAs with their loved ones, we examined associations between patients having ACP discussions with the need for assistance with personal care, chronic pain, life satisfaction, prior family disagreements over health care decisions, sex, age, and interference in daily routines due to memory problems.

Methods

Data were from the Affirm Care study (N = 370), which examined social and environmental factors associated with health outcomes among PLWHAs and their informal caregivers.

Results

Slightly more than half of respondents discussed ACP with loved ones (57%). In adjusted analysis, higher levels of chronic pain (odds ratio [OR] = 2.09, P = 0.045), needing assistance with personal care (OR = 1.63, P = 0.023), greater life satisfaction (OR = 1.02, P = 0.002), prior family arguments over health care decisions (OR = 2.80, P < 0.001), and female sex (OR = 2.22, P = 0.001) were associated with higher odds of discussing ACP with loved ones, whereas age, drug use, education level, depression, and memory problems were nonsignificant.

Conclusion

These results suggest that interventions to increase ACP among PLWHAs and their loved ones should target males. The findings also suggest PLWHAs with chronic pain, the need for assistance with personal care, and those with a history of prior family arguments over health care decisions may be primed for ACP.  相似文献   
10.
We generated a novel scoring system to improve the test characteristics of D-dimer in patients with suspected PE (pulmonary emboli).Electronic Medical Record data were retrospectively reviewed on Emergency Department (ED) patients 18?years or older for whom a D-dimer and imaging were ordered between June 4, 2012 and March 30, 2016. Symptoms (dyspnea, unilateral leg swelling, hemoptysis), age, vital signs, medical history (cancer, recent surgery, medications, history of deep vein thrombosis or PE, COPD, smoking), laboratory values (quantitative D-dimer, platelets, and mean platelet volume (MPV)), and imaging results (CT, VQ) were collected.Points were designated to factors that were significant in two multiple regression analyses, for PE or positive D-dimer. Points predictive of PE were designated positive values and points predictive of positive D-dimer, irrespective of presence of PE, were designated negative values.The DAGMAR (D-dimer Assay-Guided Moderation of Adjusted Risk) score was developed using age and platelet adjustment and points for factors associated with PE and elevated D-dimer.Of 8486 visits reviewed, 3523 were unique visits with imaging, yielding 2253 (26.5%) positive D-dimers. 3501 CT scans and 156 VQ scans were completed, detecting 198 PE.In our cohort, a DAGMAR Score?<?2 equated to overall PE risk?<?1.2%. Specificity improved (38% to 59%) without compromising sensitivity (94% to 96%). Use of the DAGMAR Score would have reduced CT scans from 2253 to 1556 and lead to fewer false negative results.By considering factors that affect D-dimer and also PE, we improved specificity without compromising sensitivity.  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