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   4144篇
  免费   357篇
  国内免费   5篇
耳鼻咽喉   11篇
儿科学   149篇
妇产科学   198篇
基础医学   586篇
口腔科学   92篇
临床医学   398篇
内科学   629篇
皮肤病学   72篇
神经病学   317篇
特种医学   227篇
外国民族医学   1篇
外科学   598篇
综合类   123篇
一般理论   3篇
预防医学   601篇
眼科学   29篇
药学   233篇
中国医学   3篇
肿瘤学   236篇
  2021年   70篇
  2020年   44篇
  2019年   66篇
  2018年   75篇
  2017年   59篇
  2016年   62篇
  2015年   45篇
  2014年   101篇
  2013年   141篇
  2012年   170篇
  2011年   195篇
  2010年   92篇
  2009年   87篇
  2008年   168篇
  2007年   184篇
  2006年   179篇
  2005年   168篇
  2004年   179篇
  2003年   164篇
  2002年   155篇
  2001年   169篇
  2000年   148篇
  1999年   119篇
  1998年   58篇
  1997年   38篇
  1996年   29篇
  1995年   33篇
  1994年   41篇
  1993年   34篇
  1992年   105篇
  1991年   91篇
  1990年   76篇
  1989年   88篇
  1988年   88篇
  1987年   79篇
  1986年   70篇
  1985年   62篇
  1984年   48篇
  1983年   49篇
  1982年   38篇
  1981年   28篇
  1980年   30篇
  1979年   61篇
  1978年   51篇
  1977年   39篇
  1975年   25篇
  1974年   42篇
  1973年   34篇
  1972年   31篇
  1970年   27篇
排序方式: 共有4506条查询结果,搜索用时 15 毫秒
81.
Despite improved understanding and treatment of community acquired pneumonia (CAP), variations in clinical practice and patient outcomes still exists, resulting in excess healthcare dollars spent and decreased patient satisfaction. The use of treatment and outcomes research data can help providers improve their methods and standardize techniques to control costs and provide the best care for their patients. To better understand the utility and capabilities of this research, this article will compare several administrative and clinical databases. Two, data sources in particular, the EPI-Q Inc. CAP-Compare database and the University HealthSystem Consortium's (UHC) CAP Benchmarking Program contain clinical and utilization data specific to CAP. In addition there are several government and non-government sponsored data sources that include administrative data on many diagnosis including CAP. These include: Healthcare Benchmarking Systems International's EXPLORE database, the Center for Healthcare Industry Performance Studies database, the National Center for Health Statistics'--National Hospital Discharge Survey, and the Medicare Provider Analysis and Review data files.  相似文献   
82.
Prodromal symptoms and other variables for a sample of 200 young people who had experienced a first-onset functional psychosis, were analyzed to examine their diagnostic efficiency and predictive power in relation to a diagnosis of schizophrenia. Two different techniques were utilized to generate optimal cut-off points for a number of prodromal symptoms, and optimal decision rules to maximize diagnostic efficiency. The product of the chance-corrected sensitivity and specificity, or the area under the QROC curve, was used to assess the predictive efficiency of a number of prodromal variables, DSM-III-R prodromal variables, pre-psychotic deterioration, pre-morbid functioning, and prodromal duration. The SPAN technique generated a decision rule that performed equivalently to the single variable 'duration of prodrome'. Implications of these results for future research are discussed.  相似文献   
83.
84.
Mental health problems are common in children and adolescents, yet evidence-based treatments are hard to access. Self-help interventions can increase such access. The aim of this paper was to conduct a systematic review and meta-analysis of the use of guided and unguided self-help for children and young people with symptoms of common mental health disorders. In contrast to previous reviews of self-help in children, all types of self-help and multiple mental health disorders were investigated in order to increase power to investigate potential moderators of efficacy. Importantly, studies with control arms as well as those comparing against traditional face-to-face treatments were included. Fifty studies (n = 3396 participants in self-help/guided self-help conditions) met the inclusion criteria. Results demonstrated a moderate positive effect size for guided and unguided self-help interventions when compared against a control group (n = 44; g = 0.49; 95% CI: 0.37 to 0.61, p < .01) and a small but significant negative effect size when compared to other therapies (n = 15; g = −0.17; 95% CI: –0.27 to –0.07, p < .01). Few potential moderators had a significant effect on outcome. Most comparisons resulted in significant heterogeneity and therefore results are interpreted with caution.  相似文献   
85.
86.
87.
This study examined waiting times for diagnostic assessment of Autism Spectrum Disorder in 11 adult services, prior to and following the implementation of a 12 month change program. Methods to support change are reported and a multi-level modelling approach determined the effect of the change program on overall wait times. Results were statistically significant (b?=???0.25, t(136)?=???2.88, p?=?0.005). The average time individuals waited for diagnosis across all services reduced from 149.4 days prior to the change program and 119.5 days after it, with an average reduction of 29.9 days overall. This innovative intervention provides a promising framework for service improvement to reduce the wait for diagnostic assessment of ASD in adults across the range of spectrum presentations.  相似文献   
88.
Human papillomavirus (HPV) is a prevalent sexually transmitted infection (STI) among college students. Although previous research has studied HPV-related health communication strategies using various framing techniques, the goal of this study is to test how two unique message frames—whether mentioning HPV as an STI and whether to attribute the cause of infection as external or internal—would influence young adults’ intentions to receive the recommended HPV vaccine. Results indicate that gender and causal attribution framing influenced participants’ intentions to receive the HPV vaccine.  相似文献   
89.
90.
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