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   2240篇
  免费   412篇
  国内免费   9篇
耳鼻咽喉   10篇
儿科学   99篇
妇产科学   176篇
基础医学   152篇
口腔科学   20篇
临床医学   1115篇
内科学   276篇
皮肤病学   19篇
神经病学   99篇
特种医学   80篇
外国民族医学   1篇
外科学   190篇
综合类   26篇
预防医学   153篇
眼科学   34篇
药学   47篇
肿瘤学   164篇
  2024年   11篇
  2023年   57篇
  2021年   44篇
  2020年   33篇
  2019年   28篇
  2018年   104篇
  2017年   109篇
  2016年   107篇
  2015年   108篇
  2014年   104篇
  2013年   121篇
  2012年   82篇
  2011年   93篇
  2010年   93篇
  2009年   116篇
  2008年   67篇
  2007年   77篇
  2006年   70篇
  2005年   62篇
  2004年   59篇
  2003年   45篇
  2002年   55篇
  2001年   68篇
  2000年   43篇
  1999年   66篇
  1998年   57篇
  1997年   71篇
  1996年   67篇
  1995年   56篇
  1994年   46篇
  1993年   38篇
  1992年   44篇
  1991年   34篇
  1990年   43篇
  1989年   29篇
  1988年   28篇
  1987年   30篇
  1986年   33篇
  1985年   31篇
  1984年   27篇
  1983年   15篇
  1982年   17篇
  1981年   17篇
  1980年   11篇
  1979年   22篇
  1978年   14篇
  1977年   11篇
  1976年   12篇
  1975年   20篇
  1974年   11篇
排序方式: 共有2661条查询结果,搜索用时 12 毫秒
991.
992.
993.
The aim of this study is to explore the different handover models and processes available and their efficacy in improving handover communication within nursing practice. The handover of information is a key nursing responsibility that ensures patient outcomes through continuity of care. This process is widely recognised as an opening for error that may comprise patient safety. This paper is an integrative literature review that employed an inductive exploratory design. A computerised database search was employed including CINAHL, PubMed and Science Direct and a manual citation search with included papers limited to papers published 2005–2016, in English with full text freely available. This included a systematic search strategy, a critical appraisal of the papers utilising the Critical Appraisal Skills Programme, an inductive data extraction and thematic analysis. Sixteen papers were included in this review. The results detailed that there are various handover models in use, yet there is no evidence that any one model displays superior efficacy. The iSoBAR model and its adaptations remain the only model employed across various specialties. More research is warranted to determine if any handover model displays superior efficacy or transferability.  相似文献   
994.
995.
Red cells (RBCs) of individuals with the In(Lu) gene are characterized by suppression of the Lutheran, P1, i, and other blood group antigens, acanthocytosis, and abnormal electrolyte metabolism. To determine the clinical significance of these abnormalities, the survival of autologous RBCs was determined by 51Cr in two siblings with the dominant Lu(a-b-) [In(Lu)] phenotype. Both subjects studied had normal hemoglobin, hematocrit, reticulocyte count, haptoglobin, and ferritin values. RBC indices were mildly hypochromic. Examination of the peripheral smear showed mild acanthocytosis in one individual. Analysis of RBC distribution on discontinuous density gradients showed a shift to lighter fractions than normal control RBCs. Storage of these Lu (a-b-) RBCs at 4 degrees C showed significant hemolysis within a few days; this was confirmed by increased autohemolysis, which was reduced by glucose and ATP. RBC cation content (sodium and potassium) was higher than that in control cells, which indicated increased cell hydration, which explains the lighter density and mild hypochromia of the Lu(a-b-) RBCs. 51Cr survival of autologous Lu(a-b-) RBCs was normal in both subjects studied. The data indicate that the morphologic and cation abnormalities of RBCs of persons with the In(Lu) gene are clinically insignificant, as these cells have normal in vivo survival. Such RBCs, however, are susceptible to increased hemolysis in vitro under standard blood banking storage conditions. Individuals of the Lu(a-b-) phenotype, associated with In(Lu), may not be suitable candidates for routine blood donation.  相似文献   
996.
Although the analgesic effects observed during the application of vibration may be attributable to neuronal inhibition of the pain pathways, this does not account for the fact that pain relief sometimes persists for a long time after the end of vibration treatment. Two experiments were carried out in order to determine whether pain relief might involve the release of endogenous opioids. In the first experiment, we studied the effects of injecting either a morphine antagonist, naloxone (0.4 mg), or a placebo, on the analgesia resulting from vibratory stimulation in 12 patients suffering from acute or chronic pain. In the second experiment, the Met-enkephalin and beta-endorphin levels were determined before and after 30 min vibratory stimulation in the cerebrospinal fluid of 8 patients suffering from chronic pain and 1 control subject, all of whom had been fitted with a ventriculo-peritoneal drain which made it possible to collect samples of cerebrospinal fluid painlessly. The results of these experiments show, on the one hand, that the effects of naloxone on the vibration-induced analgesia did not differ from those of the placebo and, on the other hand, that no increase in the Met-enkephalin or beta-endorphin levels occurred concomitantly with pain relief. It will therefore be necessary to investigate other mechanisms as possible means of explaining the post-vibratory analgesic effects.  相似文献   
997.
The social bases of discrepancies in health/illness perceptions   总被引:1,自引:0,他引:1  
Health care professionals generally assume that their perceptions and assessments of their patients' health status are accurate and are congruent with those of the patient and other health care providers. However, despite the patient education process, there is evidence that discrepancies in perceptions persist. These discrepancies are of particular concern to nurses because they may interfere with the provision of quality patient care. Poor communication, non-compliance with the treatment regimen, inadequate or unnecessary treatment, and ethical problems could be outcomes of discrepancies in perceptions. In this paper, the literature pertaining to discrepancies in health/illness perceptions is reviewed. As well, several social factors that may affect perceptions are described. These include cultural background, gender, socioeconomic status, experience and role. The effect of occupational role on health/illness perceptions has not been examined systematically. Regarding differences in perceptions of physicians, nurses and patients, further research is required to clarify and explain the nature of discrepancies in health/illness perceptions.  相似文献   
998.
999.
1000.
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