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   101364篇
  免费   29507篇
  国内免费   1108篇
耳鼻咽喉   2408篇
儿科学   2695篇
妇产科学   2466篇
基础医学   3268篇
口腔科学   5156篇
临床医学   26332篇
内科学   25179篇
皮肤病学   3380篇
神经病学   12584篇
特种医学   3737篇
外国民族医学   7篇
外科学   17965篇
综合类   136篇
现状与发展   40篇
一般理论   2篇
预防医学   13680篇
眼科学   2139篇
药学   1451篇
中国医学   24篇
肿瘤学   9330篇
  2024年   748篇
  2023年   5054篇
  2022年   1160篇
  2021年   2818篇
  2020年   5388篇
  2019年   2090篇
  2018年   6938篇
  2017年   7378篇
  2016年   8015篇
  2015年   8096篇
  2014年   10547篇
  2013年   12251篇
  2012年   4028篇
  2011年   3895篇
  2010年   6989篇
  2009年   9261篇
  2008年   3741篇
  2007年   2714篇
  2006年   3859篇
  2005年   2400篇
  2004年   1725篇
  2003年   1333篇
  2002年   1256篇
  2001年   1833篇
  2000年   1154篇
  1999年   1705篇
  1998年   2108篇
  1997年   1946篇
  1996年   1989篇
  1995年   1709篇
  1994年   1106篇
  1993年   928篇
  1992年   757篇
  1991年   633篇
  1990年   507篇
  1989年   512篇
  1988年   503篇
  1987年   371篇
  1986年   352篇
  1985年   292篇
  1984年   250篇
  1983年   303篇
  1982年   224篇
  1981年   195篇
  1980年   121篇
  1978年   119篇
  1977年   116篇
  1976年   84篇
  1974年   71篇
  1972年   72篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
21.
Summary: This is the first report of the largest study of blood pressure measurement in pregnancy in a New Zealand population using standardized definitions and methodology. Over 3,800 women who delivered in an 8-month period in the Wellington region were included in the study. Blood pressure measurement and the presence of oedema and proteinuria were recorded from booking until delivery and in the puerperium. Only 2.7% of women were unable to be contacted after delivery for details on outcomes. The results established normal ranges for blood pressure throughout pregnancy. The data show that Mood pressure greater than 140/90 until 35 weeks' gestation is outside 2 standard deviations at all gestations and justifies using these measurements as the definition of hypertension in pregnancy. The fall in blood pressure in the 2nd trimester was less than 1 mm Ffg per week in both the systolic and diastolic pressures. This fall was smaller than previously recorded in other studies. Gestational hypertension was the commonest blood pressure abnormality occurring in 15.2% of the population. This represented 69% of the pregnant women with a hypertensive disorder. The overall incidence of both gestational hypertension and preeclampsia was 18.5% which is higher than reported in other parts of the world. In this study obesity was significantly associated with hypertensive disorders in pregnancy. An arm circumference of >33 cm, one of the measurements of obesity, was found in 6.8% of the study population. Even after the effect of arm circumference was taken into account, hypertensive disorders were also more common in Pacific Island women. Ankle oedema was significantly associated with the development of both gestational hypertension and preeclampsia but the incidence of oedema was noted in only 11.9% of the subjects.  相似文献   
22.
Entering the postmodern world in which society is confronting crossroads, paradoxes, and complexity, the health care system is encountering a transformation more comprehensive and revolutionary than has ever been seen before. Analysis of the state of nursing vis a vis these transformations indicates that the current paradigm does not ensure the existence of the profession in the postmodern health care system. That is because of increased difficulties in consolidating the economic and quality issues into the core of nursing, and in understanding the complexity inherent in health related situations.  相似文献   
23.
Society often expects mothers and fathers to share equally in the perinatal grief process because the child was a common bond between them. Unfortunately, in perinatal grief, this is not always the case. The mother and the father can experience incongruent grieving and use discordant coping mechanisms. It is important to evaluate these differences to facilitate communication between the distraught parents. Improved communication can in turn facilitate the grieving process.  相似文献   
24.
25.
26.
Directors of nursing at 23 nursing homes with Alzheimer's units in Southwestern Pennsylvania completed a self‐reported survey of 12 questions. Responses from the self‐administered questionnaires (100% response rate) revealed a wide variation in the staff categories assessing the oral health status of newly admitted residents with AD. The respondents described oral examinations that were incomplete when compared to the oral indicators listed in the Minimum Data Set. All nursing homes reported that oral hygiene was provided each day. The number of residents in a facility had a significant effect on the frequency of oral hygiene provided. Only 52% of the facilities reported yearly oral examinations for this population. According to the respondents, dental treatment was typically performed on‐site. The oral health care costs were paid by Medicare, Medicaid, the residents/family members, or by other undescribed resources. Insufficient time, staff, and training, as well as uncooperative behavior, were identified as barriers to optimum oral health care for residents with AD. Additional staff, specialized training, and increased government reimbursement were suggested to improve the oral health care for this group of older adults. For future studies, review of medical records and on‐site evaluation of the oral health care at these facilities should be required to verify the reported practices.  相似文献   
27.
28.
29.
This column contains the presidential address presented during the Third Annual Meeting of the American Association of Heart Failure Nurses on June 28, 2007, in San Diego, California, titled "Building the Foundation of Excellence in Heart Failure Nursing."  相似文献   
30.
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