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   1473252篇
  免费   101752篇
  国内免费   2346篇
耳鼻咽喉   20750篇
儿科学   48321篇
妇产科学   41788篇
基础医学   215235篇
口腔科学   40075篇
临床医学   123858篇
内科学   294153篇
皮肤病学   31766篇
神经病学   117057篇
特种医学   55849篇
外国民族医学   457篇
外科学   221791篇
综合类   27334篇
现状与发展   1篇
一般理论   359篇
预防医学   110600篇
眼科学   33038篇
药学   111541篇
  1篇
中国医学   3088篇
肿瘤学   80288篇
  2019年   11439篇
  2018年   18324篇
  2017年   13198篇
  2016年   14320篇
  2015年   16356篇
  2014年   20946篇
  2013年   32348篇
  2012年   47566篇
  2011年   49905篇
  2010年   28149篇
  2009年   25166篇
  2008年   46924篇
  2007年   50727篇
  2006年   50197篇
  2005年   49345篇
  2004年   47115篇
  2003年   45186篇
  2002年   44150篇
  2001年   62604篇
  2000年   64161篇
  1999年   54734篇
  1998年   14993篇
  1997年   13452篇
  1996年   13650篇
  1995年   12886篇
  1994年   12234篇
  1992年   43359篇
  1991年   42479篇
  1990年   41928篇
  1989年   40545篇
  1988年   37831篇
  1987年   36914篇
  1986年   35191篇
  1985年   33506篇
  1984年   24930篇
  1983年   21685篇
  1982年   12907篇
  1981年   11356篇
  1979年   23539篇
  1978年   16494篇
  1977年   14294篇
  1976年   13465篇
  1975年   14810篇
  1974年   17417篇
  1973年   16844篇
  1972年   16014篇
  1971年   14927篇
  1970年   13879篇
  1969年   13422篇
  1968年   12571篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
91.
92.
93.
Clinical Rheumatology - Since December 2019, the pandemic caused by coronavirus disease 2019 (COVID-19) raises a real public health problem. COVID-19 appeared in Wuhan (Hubei province) in China....  相似文献   
94.

Objective

To discover the experiences of end-of-life patients attended by the emergency services, through the discourse of the family caregivers who accompanied the family member in this care transit.

Method

A qualitative approach study, based on the paradigm of hermeneutical phenomenology. In total, 81 family caregivers participated. The techniques used were the in-depth interview and the discussion group, with a total of 5 discussion groups and 41 interviews. The period of data collection was carried out between January 2013 and June 2014.

Results

In the network of discourses obtained with respect to “Urgent Care”, all the codes were grouped in relation to a single argumentative line: deficiencies in urgent care. Among them, we found different dimensions that are established depending on the different times of care, or the different determinant aspects of these deficiencies: disorganization of the care received, lack of experience of the professionals in emergencies, application of general protocols in the emergency services, inadequate care in the treatment received, delays in emergency care.

Conclusions

In general, we highlight the dissatisfaction of the family members with respect to the care received from the emergency services. The needs of these types of situation are not covered from these services and are of low quality. Therefore, it is necessary to reorient the care protocols for these patients.  相似文献   
95.
Women with pre-eclampsia have an increased risk of cardiovascular disease later in life. The aim of the study was to establish the presence and pattern of arterial stiffness in women previously with pre-eclampsia from a semi-rural region of South Africa. This was a prospective longitudinal study which involved 36 previously pre-eclamptic women and 86 non-pregnant controls (NPC) who had a past history of non-complicated pregnancy. Maternal wave reflection (augmentation index) and carotid-femoral pulse wave velocity were assessed noninvasively, using applanation tonometry with the SphygmoCor device. Endothelial function was assessed by EndoPAT 2000 device; pneumatic probes were fitted to the index fingers; induced flow-mediated reactive hyperemia; the ratio of the readings before and after occlusion was then used to calculate the score, the reactive hyperemia index (RHI) as a measure of endothelial function.

Pulse wave velocity remained significantly higher in previously pre-eclamptic women than non-pregnant controls up to three months after delivery (p < 0.05), then it reduced to nonsignificant values. All blood pressure indices (central and brachial pressures), were higher in previously pre-eclamptic women as compared to nonpregnant controls up to one year postpartum.

Regional (aortic) arterial stiffness, though it persists for some time after delivery, is transitory in previously pre-eclamptic women from the rural Africa setting. However, their increase blood pressure is an indication of compromised arterial compliance in women previously with pre-eclampsia.  相似文献   

96.
97.
98.
99.
100.
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