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   974409篇
  免费   73003篇
  国内免费   1914篇
耳鼻咽喉   13690篇
儿科学   28457篇
妇产科学   26929篇
基础医学   138274篇
口腔科学   26315篇
临床医学   82580篇
内科学   187204篇
皮肤病学   17604篇
神经病学   80583篇
特种医学   39908篇
外国民族医学   171篇
外科学   155732篇
综合类   26051篇
现状与发展   2篇
一般理论   277篇
预防医学   76791篇
眼科学   21945篇
药学   71665篇
中国医学   1808篇
肿瘤学   53340篇
  2018年   19087篇
  2017年   15321篇
  2016年   17661篇
  2015年   8584篇
  2014年   12062篇
  2013年   17843篇
  2012年   26929篇
  2011年   34856篇
  2010年   22359篇
  2009年   19415篇
  2008年   33786篇
  2007年   38296篇
  2006年   25542篇
  2005年   27041篇
  2004年   26925篇
  2003年   27231篇
  2002年   24968篇
  2001年   36579篇
  2000年   37405篇
  1999年   31426篇
  1998年   9529篇
  1997年   8900篇
  1996年   8716篇
  1995年   8262篇
  1994年   7951篇
  1992年   26952篇
  1991年   26401篇
  1990年   25884篇
  1989年   24940篇
  1988年   23438篇
  1987年   23134篇
  1986年   21939篇
  1985年   21329篇
  1984年   16549篇
  1983年   14143篇
  1982年   8984篇
  1981年   8265篇
  1979年   16908篇
  1978年   12210篇
  1977年   10252篇
  1976年   9430篇
  1975年   10203篇
  1974年   12705篇
  1973年   12191篇
  1972年   11581篇
  1971年   10711篇
  1970年   10277篇
  1969年   9970篇
  1968年   8941篇
  1967年   8256篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
62.
63.
64.
While peer support has been investigated in multiple clinical contexts, its application to the postpartum setting is unknown. The aim was to assess acceptability of a postpartum peer support program for women with diabetes. Observational survey-based needs assessment of forty low-income women with diabetes, receiving care at a major medical institution. Mean age and gravidity were 30.7 years and 3.15 ± 1.67 respectively. 45 % expressed interest in a “buddy.” There was no significant difference between groups desiring and not desiring this program. A majority of respondents desired telephone, text messaging, and in-person contacts (79.2, 72.1, 83.8 %), with 72.5 % of patients desiring diabetes-related activities during clinic waiting time. Many women desire a postpartum diabetes reciprocal peer program for support outside of clinician visits. Patients are receptive to educational services during their wait and outside of clinic time, a potentially valuable opportunity to share important health information.  相似文献   
65.
The antigenic heterogeneity of Orientia in India is still unknown in many disease endemic areas. The present study aims to characterize the strains of O. tsutsugamushi circulating in Nagaland, Northeast India. Two patients clinically diagnosed with ST and hospitalized in Mon district hospital, Nagaland were identified from whom eschar tissues were collected. Both patients demonstrated antibodies against O. tsutsugamushi along with positive PCR amplification for 56 ?kDa gene. The prototype strain TA763 shared 90.4% homology with the sequences. Both the sequences formed a distinctive cluster demonstrating 100% similarity with strains identified from Thailand, Vietnam, China and southern parts of India.  相似文献   
66.
67.
68.
69.
70.
The aim of this study was to analyse the effect of body mass index (BMI), both low and high values, on the perioperative complication rate in patients with oral squamous cell carcinoma (OSCC). The medical records of 259 patients operated between 2014 and 2017 for OSCC were reviewed. Univariate and multivariate analyses were performed. Sixty of the 259 patients developed 87 complications. Low or high BMI was not associated with the perioperative complication rate. A longer operating time and increased blood loss were associated with a higher perioperative complication rate and higher Clavien–Dindo grade. Low BMI, American Society of Anesthesiologists score 2 and 3, a longer operating time, and increased blood loss were associated with a longer hospital stay. Low BMI was associated with a longer hospital stay. Neither low nor high BMI was associated with the perioperative complication rate. A longer operating time and increased blood loss were associated with a higher perioperative complication rate and higher Clavien–Dindo grade.  相似文献   
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