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   2871篇
  免费   318篇
  国内免费   21篇
耳鼻咽喉   32篇
儿科学   85篇
妇产科学   58篇
基础医学   363篇
口腔科学   48篇
临床医学   303篇
内科学   539篇
皮肤病学   65篇
神经病学   277篇
特种医学   141篇
外科学   441篇
综合类   73篇
一般理论   2篇
预防医学   303篇
眼科学   52篇
药学   291篇
肿瘤学   137篇
  2021年   39篇
  2020年   29篇
  2019年   45篇
  2018年   56篇
  2017年   35篇
  2016年   42篇
  2015年   50篇
  2014年   58篇
  2013年   90篇
  2012年   111篇
  2011年   135篇
  2010年   90篇
  2009年   61篇
  2008年   119篇
  2007年   138篇
  2006年   125篇
  2005年   124篇
  2004年   104篇
  2003年   100篇
  2002年   119篇
  2001年   116篇
  2000年   107篇
  1999年   69篇
  1998年   48篇
  1997年   50篇
  1996年   43篇
  1995年   33篇
  1994年   21篇
  1993年   27篇
  1992年   55篇
  1991年   69篇
  1990年   60篇
  1989年   75篇
  1988年   76篇
  1987年   63篇
  1986年   61篇
  1985年   61篇
  1984年   52篇
  1983年   36篇
  1982年   18篇
  1981年   21篇
  1979年   26篇
  1978年   23篇
  1977年   38篇
  1976年   29篇
  1975年   29篇
  1974年   31篇
  1973年   28篇
  1972年   16篇
  1968年   18篇
排序方式: 共有3210条查询结果,搜索用时 0 毫秒
51.
As an accrediting agency recognized by the U.S. Department of Education (USDE) and the Council for Higher Education Accreditation (CHEA), the Accreditation Commission for Education in Nursing (ACEN) has established Accreditation Standards and Criteria for the evaluation of nursing programs, including the evaluation of outcomes. This article focuses on the essential components and processes for systematic evaluation of program outcomes, including licensure examination pass rate, program completion rate, and job placement rate.  相似文献   
52.
Purpose: To detect any improvement of awareness in prolonged disorders of consciousness in the long term.

Methods: A total of 34 patients with prolonged disorders of consciousness (27 vegetative state and seven minimally conscious state; 16 males; aged 21–73) were included in the study. All patients were initially diagnosed with vegetative/minimally conscious state on admission to our specialist neurological rehabilitation unit. Re-assessment was performed 2–16?years later using Coma Recovery Scale-Revised.

Results: Although remaining severely disabled, 32% of the patients showed late improvement of awareness evidenced with development of non-reflexive responses such as reproducible command following and localization behaviors. Most of the late recoveries occurred in patients with subarachnoid hemorrhage (5/11, 45.5%). The ages of patients within the late recovery group (Mean?=?45, SD?=?11.4) and non-recovery group (Mean?=?43, SD?=?15.5) were not statistically different (p?=?0.76).

Conclusions: This study shows that late improvements in awareness are not exceptional in non-traumatic prolonged disorders of consciousness cases. It highlights the importance of long-term follow up of patients with prolonged disorders of consciousness, regardless of the etiology, age, and time passed since the brain injury. Long-term follow up will help clinicians to identify patients who may benefit from further assessment and rehabilitation. Although only one patient achieved recovery of function, recovery of awareness may have important ethical implications especially where withdrawal of artificial nutrition and hydration is considered.

  • Implications for rehabilitation
  • Long-term regular follow-up of people with prolonged disorders of consciousness is important.

  • Albeit with poor functional outcomes late recovery of awareness is possible in both traumatic and non-traumatic prolonged disorders of consciousness cases.

  • Recovery of awareness has significant clinical and ethical implications especially where withdrawal of artificial nutrition and hydration is considered.

  相似文献   
53.
54.
55.
Brain metastasis from papillary thyroid carcinoma (PTC) is extremely rare and carries a poor prognosis. We report nine cases (five females and four males) of brain metastasis of PTC. The age of patients ranged from 46 to 87 years old. The patients presented with nonspecific symptoms such as headaches. Brain metastasis was the first clinical presentation in three of nine patients; two of which had the aggressive tall cell variant of PTC. Six patients had prior history of PTC (four classic, one oncocytic variant, and one columnar cell variant) for 2 to 17 years with a median of 12 years. Gross total resection of brain metastasis was achieved for eight of our patients. Eight patients were treated with radioactive iodine. The median follow-up time was 12 months, ranging from 1 month to 4 years. Three patients died of their disease in 6 months, 21 months and 4 years, respectively after their first presentation of brain metastasis. It seems that these rare aggressive variants of PTC, such as tall cell variant, not only have higher propensity to develop brain metastasis, but also more frequently present with brain metastasis as their first clinical presentation than classic PTC. Furthermore, patients with PTC can develop brain metastasis even after many years.  相似文献   
56.
57.

Background

Telehealth shows promise for supporting patients in managing their long-term health conditions, such as chronic obstructive pulmonary disease (COPD). However, it is currently unclear how patients, and particularly older people, may benefit from these technological interventions.

Aim

To explore patients’ expectations and experiences of using a mobile telehealth-based (mHealth) application and to determine how such a system may impact on their perceived wellbeing and ability to manage their COPD.

Design and setting

Embedded qualitative study using interviews with patients with COPD from various community NHS services: respiratory community nursing service, general practice, and pulmonary rehabilitation.

Method

An embedded qualitative study was conducted to which patients were recruited using purposive sampling to achieve maximum variation. Interviews were carried out prior to receiving the mHealth system and again after a 6-month period. Data were analysed using a grounded theory approach.

Results

The sample comprised 19 patients (aged 50–85 years) with varied levels of computer skills. Patients identified no difficulties in using the mHealth application. The main themes encapsulating patients’ experience of using the mHealth application related to an increased awareness of the variability of their symptoms (onset of exacerbation and recovery time) and reassurance through monitoring (continuity of care).

Conclusion

Patients were able to use the mHealth application, interpret clinical data, and use these within their self-management approach regardless of previous knowledge. Telehealth interventions can complement current clinical care pathways to support self-management behaviour.  相似文献   
58.
AIM:To ascertain whether caecal pH is different in patients with irritable bowel syndrome(IBS),whose primary symptoms are bloating and distension,to healthy controls.METHODS:Motility and pH data were reviewed from16 patients with RomeⅢdefined IBS and 16 healthy controls,who had undergone a wireless motility capsule(WMC)study using a standardized protocol.Motility measures were anchored around known anatomical landmarks as identified by compartmental pH changes.Sixty-minute epochs were used to quantify antral,duodenal,ileal,caecal and distal colonic contractility.The maximum and minimum pH was measured either side of the ileo-caecal junction.RESULTS:No differences were seen in motility parameters,compartmental transit times or maximal ileal pH between the two groups.Caecal pH was significantly lower in patients compared to controls(5.12±0.05vs 6.16±0.15,P<0.0001).The ileal:caecalΔchange was greater in patients than controls(-2.63±0.08 vs-1.42±0.11,P<0.0001).There was a significant correlation between caecal pH and right colonic contractility(r=0.54,P=0.002).CONCLUSION:Patients with bloating and distension have a lower caecal pH compared to controls.The measurement of caecal pH using the WMC provides a quantifiable biomarker of fermentation potentially identifying those patients that may preferentially benefit from antibiotic or dietary interventions.  相似文献   
59.
60.
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