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   204012篇
  免费   13308篇
  国内免费   787篇
耳鼻咽喉   2828篇
儿科学   5629篇
妇产科学   3947篇
基础医学   26435篇
口腔科学   3888篇
临床医学   19972篇
内科学   43795篇
皮肤病学   3180篇
神经病学   20354篇
特种医学   7265篇
外国民族医学   13篇
外科学   30859篇
综合类   2559篇
现状与发展   4篇
一般理论   252篇
预防医学   15182篇
眼科学   5152篇
药学   12766篇
中国医学   236篇
肿瘤学   13791篇
  2023年   986篇
  2022年   1734篇
  2021年   4065篇
  2020年   2403篇
  2019年   3809篇
  2018年   4510篇
  2017年   3223篇
  2016年   3591篇
  2015年   4352篇
  2014年   6330篇
  2013年   9356篇
  2012年   13561篇
  2011年   14322篇
  2010年   7987篇
  2009年   7205篇
  2008年   12892篇
  2007年   13725篇
  2006年   13047篇
  2005年   13309篇
  2004年   12540篇
  2003年   11848篇
  2002年   11328篇
  2001年   1652篇
  2000年   1267篇
  1999年   1751篇
  1998年   2477篇
  1997年   2140篇
  1996年   1831篇
  1995年   1687篇
  1994年   1497篇
  1993年   1431篇
  1992年   1152篇
  1991年   1061篇
  1990年   940篇
  1989年   932篇
  1988年   934篇
  1987年   815篇
  1986年   925篇
  1985年   1007篇
  1984年   1315篇
  1983年   1248篇
  1982年   1723篇
  1981年   1588篇
  1980年   1475篇
  1979年   863篇
  1978年   986篇
  1977年   844篇
  1976年   745篇
  1975年   605篇
  1974年   637篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
11.
12.
Chronic pain in the UK affects up to 43% of the population. The consequences include physical and psychological distress, loss of function, employment, family and social strain and increased utilization of healthcare services. Modern pain management services operate across primary, secondary and tertiary care and incorporate general practitioners, psychologists, physiotherapists, pharmacists, specialist nurses, pain physicians and surgeons. This allows for a coordinated approach to chronic pain, engaging the patient in a structured pathway from conservative measures, through to surgery if necessary. Surgical interventions have been utilized effectively throughout the 20th century for the treatment of a variety of conditions, some of which are now effectively managed with improved pharmacological approaches or novel neuromodulation techniques. Ablative procedures that aim to permanently interrupt the pain pathway still represent the final solution for some conditions, particularly those with cancer associated pain; however, the search for less invasive, less risky measures continues. This is stimulated by an increased understanding of the neurobiology of pain transmission and the physiological changes which occur in persistent pain.  相似文献   
13.
ObjectiveTo evaluate changes in insurance status among emergency department (ED) patients presenting in the two years immediately before and after full implementation of the Affordable Care Act (ACA).MethodsWe evaluated National Hospital Ambulatory Medical Care Survey (NHAMCS) Emergency Department public use data for 2012–2015, categorizing patients as having any insurance (private; Medicare; Medicaid; workers' compensation) or no insurance. We compared the pre- and post-ACA frequency of insurance coverage—overall and within the older (≥65), working-age (18–64) and pediatric (<18) subpopulations—using unadjusted odds ratios with 95% confidence intervals. We also conducted a difference-in-differences analysis comparing the change in insurance coverage among working-age patients with that observed for older Medicare-eligible patients, while controlling for sex, race and underlying temporal trends.ResultsOverall, the proportion of ED patients with any insurance did not significantly change from 2012 to 2013 to 2014–2015 (74.2% vs 77.7%) but the proportion of working-age adult patients with at least one form of insurance increased significantly, from 66.0% to 71.8% (OR 1.31, CI: 1.13–1.52). The difference-in-differences analysis confirmed the change in insurance coverage among working-age adults was greater than that seen in the reference population of Medicare-eligible adults (AOR 1.70, CI: 1.29–2.23). The increase was almost entirely attributable to increased Medicaid coverage.ConclusionIn the first two years following full implementation of the ACA, there was a significant increase in the proportion of working-age adult ED patients who had at least one form of health insurance. The increase appeared primarily associated with expansion of Medicaid.  相似文献   
14.
Abstract

Objectives: This study examined word use as an indicator of interpersonal positive reframing in daily conversations of couples coping with breast cancer and as a predictor of stress.

Design: The Electronically Activated Recorder (EAR) and Linguistic Inquiry and Word Count (LIWC) were used to examine naturally occurring word use conceptually linked to positive reframing (positive emotion, negative emotion, and cognitive processing words).

Sample: Fifty-two couples coping with breast cancer.

Methods: Couples wore the EAR, a device participants wear, that audio-recorded over one weekend (>16,000 sound files), and completed self-reports of positive reframing (COPE) and stress (Perceived Stress Scale). LIWC, a software program, measured word use.

Findings: Both partners’ word use (i.e., positive emotion and cognitive processing words) was associated with their own reported positive reframing, and spouses’ word use was also indicative of patients’ positive reframing. Results also revealed that, in general, words indicating positive reframing predicted lower levels of stress.

Conclusions: Findings supported the hypothesis that partners—and particularly spouses of breast cancer patients—may assist each other’s coping by positively reframing the cancer experience and other negative experiences in conversation.  相似文献   
15.
16.
17.
18.
19.
20.
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