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   179685篇
  免费   1308篇
  国内免费   21篇
耳鼻咽喉   1158篇
儿科学   6802篇
妇产科学   3118篇
基础医学   16959篇
口腔科学   1566篇
临床医学   13243篇
内科学   31527篇
皮肤病学   818篇
神经病学   16889篇
特种医学   8971篇
外科学   29237篇
综合类   2367篇
一般理论   8篇
预防医学   18642篇
眼科学   2817篇
药学   9654篇
中国医学   625篇
肿瘤学   16613篇
  2023年   56篇
  2022年   49篇
  2021年   193篇
  2020年   86篇
  2019年   183篇
  2018年   22093篇
  2017年   17466篇
  2016年   19633篇
  2015年   1029篇
  2014年   974篇
  2013年   1054篇
  2012年   7293篇
  2011年   21331篇
  2010年   18966篇
  2009年   11676篇
  2008年   19751篇
  2007年   21975篇
  2006年   812篇
  2005年   2470篇
  2004年   3632篇
  2003年   4591篇
  2002年   2680篇
  2001年   298篇
  2000年   429篇
  1999年   195篇
  1998年   240篇
  1997年   243篇
  1996年   115篇
  1995年   141篇
  1994年   118篇
  1993年   75篇
  1992年   50篇
  1991年   95篇
  1990年   132篇
  1989年   81篇
  1988年   55篇
  1987年   50篇
  1986年   31篇
  1985年   46篇
  1984年   25篇
  1983年   26篇
  1982年   30篇
  1980年   42篇
  1968年   27篇
  1938年   60篇
  1937年   25篇
  1935年   24篇
  1934年   30篇
  1932年   57篇
  1930年   48篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
Relationship-centered care reflects both knowing and feeling: the knowledge that physician and patient bring from their respective domains of expertise, and the physician’s and patient’s experience, expression, and perception of emotions during the medical encounter. These processes are conveyed and reciprocated in the care process through verbal and nonverbal communication. We suggest that the emotional context of care is especially related to nonverbal communication and that emotion-related communication skills, including sending and receiving nonverbal messages and emotional self-awareness, are critical elements of high-quality care. Although nonverbal behavior has received far less study than other care processes, the current review argues that it holds significance for the therapeutic relationship and influences important outcomes including satisfaction, adherence, and clinical outcomes of care.  相似文献   
32.
Objective: To document the breastfeeding practices of Aboriginal mothers delivering in Perth. Design and methods: A cohort of mothers was followed from the time of delivery for six months to obtain details of infant feeding practices. Subjects: A total of 455 mothers delivered during the study period and were asked to participate. A total of 425 mothers completed the initial questionnaire. Setting: The study was undertaken in six public hospitals in Perth, Western Australia. Data analyses: The data were analysed using spss . Breastfeeding duration was calculated using Kaplan–Meier survival analysis. Main outcome measures: Breastfeeding initiation and duration. Results: The mean age of the Aboriginal mothers was 21.8 years (range 14–39 years, SD 5.32) and the average gestational age was 38.3 weeks. Almost 50% of the mothers in the study delivered by Caesarean section. At discharge from hospital 89.4% (CI 86.6–92.1) of mothers were breastfeeding, declining to 58.8% (CI 53.5–64.1) at six months. When compared with non‐Aboriginal mothers, the Aboriginal breastfeeding rates were higher than the non‐Aboriginal average breastfeeding rates, but lower than the highest socioeconomic group. Conclusions: The breastfeeding rates of Aboriginal mothers are higher than for other Australians. This is despite the low maternal age and level of education and the high rates of low‐birth‐weight infants and Caesarean section among this population. The World Health Organization recommendation for infant feeding is exclusive breastfeeding until six months, but less than one‐third of Aboriginal mothers achieved this recommendation.  相似文献   
33.
Coronary flow reserve (CFR) has been used toassess coronary microcirculation and epicardial coro-nary stenoses[1— 3 ] . CFR is defined as the ratio ofcoronary flow under maximal coronary vasodilatationto coronary flow under resting conditions[4 ] .Whenthe cross- sectional area of epicardial coronary arteriesis constant,coronary flow velocity (CFV) ratios areequal to volume flow ratios.The most common method used clinically formeasuring CFVR is intracoronary Doppler flow(ICD) analysis re…  相似文献   
34.
This paper reports on the findings of a research study, conducted via a postal questionnaire, which aimed to elicit the wishes, needs and satisfaction with special educational provision of parents of children with severe or profound and multiple learning difficulties. Parents' views regarding services received, type of housing and employment preferred for their child, present and future concerns are also reported. The results indicated that the majority of parents in the sample are generally satisfied with their child's current special school placement and do not want a change of placement. However, one in five parents did indicate a desire for a change of placement, with the preferred option being a special class in an ordinary school. A priority for their child's learning is communication skills. A desire for a high level of involvement in their child's education was indicated but, on the whole, parents did not achieve as high a level as they would wish. Parents were generally satisfied with services received but a significant proportion expressed a desire for additional services. In terms of the future, the majority of parents expect that their child is unlikely to live or work independently or semi-independently as an adult. The paper concludes by discussing ways of enhancing parents' involvement in the decision-making process regarding special provision for their child.  相似文献   
35.
36.
37.
38.
39.
40.
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