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   39338篇
  免费   7120篇
  国内免费   145篇
耳鼻咽喉   814篇
儿科学   1240篇
妇产科学   1052篇
基础医学   2781篇
口腔科学   2886篇
临床医学   6552篇
内科学   8042篇
皮肤病学   770篇
神经病学   3933篇
特种医学   1578篇
外科学   5744篇
综合类   270篇
现状与发展   12篇
一般理论   14篇
预防医学   4684篇
眼科学   666篇
药学   1484篇
  2篇
中国医学   14篇
肿瘤学   4065篇
  2024年   184篇
  2023年   1221篇
  2022年   550篇
  2021年   1073篇
  2020年   1481篇
  2019年   928篇
  2018年   1825篇
  2017年   1617篇
  2016年   1854篇
  2015年   1984篇
  2014年   2511篇
  2013年   3192篇
  2012年   1926篇
  2011年   1891篇
  2010年   2004篇
  2009年   2483篇
  2008年   1675篇
  2007年   1480篇
  2006年   1607篇
  2005年   1363篇
  2004年   1111篇
  2003年   998篇
  2002年   886篇
  2001年   798篇
  2000年   652篇
  1999年   705篇
  1998年   666篇
  1997年   634篇
  1996年   661篇
  1995年   482篇
  1994年   408篇
  1993年   371篇
  1992年   415篇
  1991年   394篇
  1990年   382篇
  1989年   372篇
  1988年   372篇
  1987年   326篇
  1986年   315篇
  1985年   314篇
  1984年   220篇
  1983年   244篇
  1982年   181篇
  1981年   147篇
  1980年   128篇
  1979年   159篇
  1978年   148篇
  1977年   126篇
  1976年   117篇
  1975年   108篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
5.
6.
OBJECTIVE: To survey nurses around the world about current practices for peritoneal dialysis (PD) home training programs. DESIGN: Random sampling of nurses to complete a written survey from the International Society for Peritoneal Dialysis Nursing Liaison Committee. Settings: United States, Canada, South America (Brazil, Columbia), The Netherlands, Hong Kong. METHODS: Surveys and responses were sent by fax whenever possible, or by regular mail, or hand carried, or conducted by telephone. Results were stratified by geographic areas as well as by cumulative responses and were expressed as medians with ranges. Kruskal-Wallis was used to evaluate differences in responses. Associations between variables were tested with Pearson correlation. Univariate regression analysis was used to evaluate the impact of variables on peritonitis rates. Variables with p < 0.10 were included in a multivariate analysis. RESULTS: A total of 317 nurses responded: 88 in the United States, 46 in Canada, 58 in South America, 58 in Hong Kong, and 67 in The Netherlands. This represented 37% of all surveys distributed. Respondents had a median of 12 years' experience in nephrology (range 1-35 years), but only 31% had a formal background in adult education. Nearly half received their guidance to patient training from a nurse colleague, 11% were guided by a corporate colleague, and 8% were simply self-taught. Clinics responding had a median of 30 PD patients (range 1-400) and reported they trained a median of 8 patients per year (range 0-86). Reported peritonitis rates were a median 0.46 per year or 1 episode every 26 months. Peritonitis rates, however, were not known by 53% of respondents. Total training time per patient had a very wide range of hours, from 6 to 96. There was no correlation between training time and peritonitis rates among the study respondents (p = 0.38), nor with any other variables. CONCLUSIONS: There is wide variation in practices for PD patient training programs within countries and around the world. Training time did not appear to be related to peritonitis rates. Randomized trials of training practices are needed to determine which approaches produce the best outcomes for patients.  相似文献   
7.
8.
9.
Using complete denture treatment as an introduction to clinical patient care for dental students, the purposes of the Complete Denture Prosthodontics Transition Clinic at the University of Colorado School of Dentistry are to reduce the time lapse between the preclinical complete denture prosthodontics course and the first denture patient experience, and to encourage development of student self-confidence and skills. In the 2002 spring semester, faculty at the University of Colorado School of Dentistry initiated the Complete Denture Prosthodontics Transition Clinic for DS-II (second-year) dental students, as an introduction to clinical patient care. Each patient was assigned to a team of two dental students. Three Division of Prosthodontics faculty members staffed each clinic session, providing a student-to-faculty ratio of approximately 6.6:1 and a patient-to-faculty ratio of approximately 3.3:1. All DS-II students in the Class of 2004 delivered their first complete dentures no later than 8 months (average, 184 days) after the last day of the preclinical complete denture prosthodontics course. The time from the diagnostic appointment through the denture placement appointment averaged 39 days for patients treated in this program, compared with an average of 98 days or more for previous classes. The program was successful in achieving the goal of reducing the time lapse between the preclinical complete denture prosthodontics course and the first denture patient experience.  相似文献   
10.
Wound healing involves a number of cellular and molecular events, many of which are controlled by soluble growth factors. In the process of healing, hepatocyte growth factor, a cytokine known to act as mitogen, motogen, and morphogen, has been postulated to play multiple roles during several stages of this complex biological process. Produced primarily by stromal fibroblasts, hepatocyte growth factor regulates angiogenesis, vascular permeability, cell migration, matrix deposition and degradation, and other biological processes. The current article discusses recent progress in understanding the multiple roles played by this growth factor in tissue repair.  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