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   17743篇
  免费   1164篇
  国内免费   26篇
耳鼻咽喉   173篇
儿科学   648篇
妇产科学   719篇
基础医学   2128篇
口腔科学   240篇
临床医学   2840篇
内科学   3116篇
皮肤病学   354篇
神经病学   1524篇
特种医学   278篇
外科学   1624篇
综合类   313篇
一般理论   18篇
预防医学   2222篇
眼科学   429篇
药学   1044篇
中国医学   21篇
肿瘤学   1242篇
  2024年   18篇
  2023年   116篇
  2022年   193篇
  2021年   429篇
  2020年   314篇
  2019年   418篇
  2018年   447篇
  2017年   333篇
  2016年   375篇
  2015年   443篇
  2014年   593篇
  2013年   870篇
  2012年   1358篇
  2011年   1460篇
  2010年   770篇
  2009年   630篇
  2008年   1237篇
  2007年   1284篇
  2006年   1192篇
  2005年   1212篇
  2004年   1152篇
  2003年   1103篇
  2002年   897篇
  2001年   129篇
  2000年   111篇
  1999年   114篇
  1998年   177篇
  1997年   168篇
  1996年   124篇
  1995年   93篇
  1994年   103篇
  1993年   95篇
  1992年   75篇
  1991年   65篇
  1990年   67篇
  1989年   62篇
  1988年   49篇
  1987年   44篇
  1986年   57篇
  1985年   49篇
  1984年   66篇
  1983年   65篇
  1982年   57篇
  1981年   54篇
  1980年   56篇
  1979年   34篇
  1978年   29篇
  1977年   28篇
  1976年   21篇
  1975年   17篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
61.
There are inconsistencies in the literature regarding the prevalence of cognitive impairment among individuals with multiple sclerosis (MS). The purpose of this study was to examine perceived cognitive impairment in secondary progressive and relapsing-remitting multiple sclerosis (MS) and to examine the relationship between level of disability, age, and number of years with MS and self-reported cognitive symptoms. The sample consisted of 447 individuals (96 participants with secondary progressive MS and 351 participants with MS) who responded to mailed data collection instruments. The Performance Scales, a self-report measure of disability in eight domains of function, and a sociodemographic data sheet were analyzedfor this study. Of individuals with secondary progressive MS, 83% reported cognitive symptoms, while 82% of individuals with relapsing-remitting MS reported cognitive symptoms. Individuals with secondary progressive MS were reportedly experiencing a significantly greater level of total disability. A statistically significant, strong, positive relationship was found between cognitive symptoms and fatigue for those with secondary progressive MS and those with relapsing-remitting MS. Statistically significant, moderate, positive relationships were also found between cognitive symptoms in those with secondary progressive MS and those with relapsing-remitting MS, and sensory symptoms, vision, hand function, bladder/bowel symptoms, and spasticity. A statistically significant, weak, positive relationship was found between cognitive symptoms and mobility in individuals with relapsing-remitting MS. There was no relationship between cognitive symptoms and mobility in those with secondary progressive MS. Cognitive symptoms were not significantly related to age in those with secondary progressive MS or those with relapsing-remitting MS. In addition, cognitive symptoms were not significantly related to the number of years with MS in individuals with secondary progressive MS or those with relapsing-remitting MS. The perception of cognitive deficits in individuals with MS was found in this study to be even more prevalent than previously reported. Because cognitive deficits occur at all stages of MS, early identification and treatment is essential. Healthcare providers must aggressively screen for cognitive impairment and rehabilitate individuals with MS who exhibit symptoms.  相似文献   
62.
63.
64.
65.
PURPOSE: Elective cosmetic surgery is expanding in the UK in both the public and private sectors. Because resources are constrained, many cosmetic procedures are being excluded within the National Health Service. If guidelines on who can receive such surgery are to be evidence-based, information is needed about the level of dysfunction in patients referred for elective surgery and whether this is related to their degree of physical abnormality. METHOD: Consecutive patients referred to a regional plastic surgery and burns unit for assessment for elective cosmetic surgery completed standardised measures of physical and psychosocial dysfunction, and indicated their perception of the degree of their abnormality and their preoccupation with it. We distinguished between patients referred for physical reasons or appearance reasons only, and compared levels of physical and psychosocial dysfunction in each with published values for community and clinical samples. Surgeons indicated patients' degree of objective abnormality, and we identified the relationship of dysfunction with perceived and objective abnormality and preoccupation. RESULTS: Whether patients sought surgery for physical or appearance reasons, physical function was normal. Those seeking surgery for appearance reasons only had moderate psychosocial dysfunction, but were not as impaired as clinical groups with psychological problems. Patients seeking the correction of minor skin lesions for purely appearance reasons reported excellent physical and psychosocial function. Level of function was related (negatively) to patients' preoccupation with abnormality rather than to their perceived or objective abnormality. CONCLUSIONS: In general, patients referred for elective cosmetic surgery did not present with significant levels of dysfunction. Moreover, levels of functioning were related to preoccupation rather than to objective abnormality. Therefore, for most patients, whether surgical treatment is generally appropriate is questionable. Future guidelines must seek to identify the small minority who do have a clinical need for surgery.  相似文献   
66.
67.
68.
In the fall of 2000, the licensing examination for nursing taken by candidates in the Province of Quebec was altered to include an oral practical component. This article describes how a group of nurse clinician educators, despite severe time and human resources constraints, developed a unique and interactive program to assist graduate unlicensed nurses to successfully prepare for this new examination process.  相似文献   
69.
This paper considers the immediate post‐traumatic reactions of rescue personnel who were exposed to the Hilton Hotel bombing in Sinai. The entire rescue personnel (n = 26) were assessed and separated into two groups on the basis of previous exposure to the same type of trauma. The results suggest that among rescue personnel, those with previous exposure had a lower level of post‐traumatic symptoms than those who were being exposed for the first time. This supports the hypothesis that previous exposure to the same type of trauma has an immunizing effect for subsequent same type of traumatic event among rescue personnel. Copyright © 2005 John Wiley & Sons, Ltd.  相似文献   
70.
Over 800 Maine residents will be diagnosed with colorectal cancer (CRC) this year, and nearly 300 will die from the disease. While CRC screening can reduce these rates, it is only among insured populations that screening rates exceed 50%. This project aimed to reduce barriers to, and increase rates of CRC screening among underinsured and uninsured women, ages 50 years and over, residing in Cumberland County, Maine. The existing network of the Maine Breast and Cervical Health Program (MBCHP) was used to reach the target population. A packet containing (1) an offer for no-cost fecal occult blood test (FOBT) screening and CRC-related educational materials, and (2) a stamped, addressed postcard specifying the woman’s interest in these resources, was mailed to 300 MBCHP enrollees residing in Cumberland County. Women requesting screening were contacted by phone to further determine eligibility. Ninety-three women (31%) requested FOBT kits and 29 of these women requested educational materials. Ten women were ineligible for screening because of previous colonoscopy. Fifty-two completed FOBT kits (63%) were returned; all were negative. An additional 42 (14%) women requested educational materials only. To reduce the burden of CRC in Maine and nationally, disparate populations must be reached with efficient and effective screening services. Established networks are proven means for reaching uninsured and underinsured individuals with education, screening services, and necessary follow-up care. This project serves as a model for the future development of similar programs statewide and nationally.  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