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   158477篇
  免费   46491篇
  国内免费   275篇
耳鼻咽喉   2542篇
儿科学   6181篇
妇产科学   1677篇
基础医学   25667篇
口腔科学   6483篇
临床医学   21117篇
内科学   39725篇
皮肤病学   8493篇
神经病学   21299篇
特种医学   4940篇
外国民族医学   5篇
外科学   28116篇
综合类   932篇
一般理论   85篇
预防医学   10167篇
眼科学   2881篇
药学   11446篇
中国医学   1094篇
肿瘤学   12393篇
  2023年   615篇
  2022年   1056篇
  2021年   3641篇
  2020年   6385篇
  2019年   12804篇
  2018年   12513篇
  2017年   13105篇
  2016年   13857篇
  2015年   14016篇
  2014年   14954篇
  2013年   16334篇
  2012年   10579篇
  2011年   10678篇
  2010年   12426篇
  2009年   8512篇
  2008年   7603篇
  2007年   6578篇
  2006年   6447篇
  2005年   6021篇
  2004年   5508篇
  2003年   5183篇
  2002年   4837篇
  2001年   1404篇
  2000年   1230篇
  1999年   896篇
  1998年   888篇
  1997年   676篇
  1996年   552篇
  1995年   485篇
  1994年   444篇
  1993年   404篇
  1992年   357篇
  1991年   322篇
  1990年   279篇
  1989年   252篇
  1988年   265篇
  1987年   232篇
  1986年   213篇
  1985年   200篇
  1984年   241篇
  1983年   206篇
  1982年   211篇
  1981年   204篇
  1980年   194篇
  1979年   133篇
  1978年   129篇
  1977年   110篇
  1975年   91篇
  1974年   91篇
  1973年   93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.
7.
8.
9.

Introduction

In the United States there has been a large increase in participation in lacrosse for both males and females. The purpose of this study was to analyze the number of head injuries, injury rates (calculated using the reported number of participants) and types of head injuries that are seen in emergency departments in the United States.

Methods

We compared injuries between male and female lacrosse participants. This was a retrospective study using a publicly available database produced by the US Consumer Product Safety Commission and information about lacrosse participation from US Lacrosse.

Results

A linear regression was performed and showed a positive correlation between number of head injuries to males and time from 2002 to 2010 (R2?=?0.823; p?=?0.001). While the number of injuries to the head in female lacrosse participants was not significant. There was a negative correlation between the number of head injuries to males from 2010 to 2016 (R2?=?0.800; p?=?0.007), but again, there was no significance for female injury count (R2?=?0.417; p?=?0.117). Other significant differences between head injuries in males and females included the mechanism of injury and the type of injury recorded.

Conclusion

The most recent data from 2010 to 2016, suggest that both males and females have had a decrease in injury rate. However the total number of female head injuries is not significantly decreasing and as the sport continues to grow there will likely be more total head injuries and visits to the emergency department.  相似文献   
10.
Abstract

Purpose: We examined underlying psychosocial processes of a behavioral treatment for urinary incontinence (UI) of prostate cancer survivors.

Design: Secondary analysis of data collected from a clinical trial.

Sample: Two hundred forty-four prostate cancer survivors who participated in a clinical trial of behavioral intervention to UI as intervention or control subjects.

Methods: The participants had a 3-month behavioral intervention or usual care and were followed up for an additional 3?months. They were assessed at baseline, 3, and 6?months. Latent growth curve models were performed to examine trajectories of each study variable and relationships among the variables.

Findings: Increasing self-efficacy and social support were significantly and independently associated with more reduction of urinary leakage frequency over time.

Implications for psychosocial oncology: Providing problem-solving skills and social support, including peer support, are essential for empowering patients to reduce UI.  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