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   25088篇
  免费   1647篇
  国内免费   47篇
耳鼻咽喉   202篇
儿科学   877篇
妇产科学   702篇
基础医学   3090篇
口腔科学   260篇
临床医学   3935篇
内科学   4529篇
皮肤病学   297篇
神经病学   2482篇
特种医学   526篇
外科学   2048篇
综合类   276篇
一般理论   64篇
预防医学   3673篇
眼科学   334篇
药学   1440篇
  1篇
中国医学   26篇
肿瘤学   2020篇
  2023年   96篇
  2022年   155篇
  2021年   428篇
  2020年   290篇
  2019年   455篇
  2018年   549篇
  2017年   427篇
  2016年   439篇
  2015年   493篇
  2014年   776篇
  2013年   1237篇
  2012年   1792篇
  2011年   1870篇
  2010年   1019篇
  2009年   889篇
  2008年   1721篇
  2007年   1814篇
  2006年   1802篇
  2005年   1841篇
  2004年   1760篇
  2003年   1668篇
  2002年   1538篇
  2001年   177篇
  2000年   122篇
  1999年   238篇
  1998年   335篇
  1997年   239篇
  1996年   234篇
  1995年   222篇
  1994年   189篇
  1993年   181篇
  1992年   117篇
  1991年   106篇
  1990年   85篇
  1989年   95篇
  1988年   81篇
  1987年   74篇
  1986年   76篇
  1985年   83篇
  1984年   115篇
  1983年   114篇
  1982年   134篇
  1981年   121篇
  1980年   113篇
  1979年   58篇
  1978年   64篇
  1977年   63篇
  1976年   47篇
  1975年   43篇
  1974年   42篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
41.
42.
43.
This study examined the types of stress experienced by maternal and paternal caretakers of children with Neural Tube Defects (NTD) and examined child and family characteristics that correlated with stress. Participants were 71 two-parent families of a child with spina bifida. Parents completed the Parenting Stress Index-Short Form to measure types of stress. Additional measures were completed to investigate variables potentially related to reported stress. Fathers reported significantly higher levels of stress from “dysfunctional parent-child interaction.” Mothers' personal stress correlated with disability and medical characteristics of the child. Fathers reported more stress when the child had maladaptive behaviors and when experiencing fewer social supports and resources. Mothers and fathers coparenting a child with NTD have both common and unique stresses. It is important that both be included in parent support and education initiatives.  相似文献   
44.
45.
46.
47.
48.
ABSTRACT: Programs for preventing violence among youth should be evaluated to determine if they are effective. Nurses' logs appear to be a useful tool for evaluating school-based violence prevention programs. The logs provide a record of students' visits to the school nurse that can be used to determine if a violence prevention program is associated with a reduction in fighting—and other injury-related nurse visits. This method has many strengths: it is simple and inexpensive, it does not interrupt the school routine, it permits school-level rather than student-level data collection, it provides a ready "baseline," and it allows continuous data collection. However, potential limitations do exist. For example, the method may provide insufficient information and may be affected by factors unrelated to the intervention. School officials can increase the usefulness of the logs by encouraging standardization and providing training in their use.  相似文献   
49.
Summary An unusual case of a woman with primary biliary cirrhosis and cutaneous sarcoidosis is described. The factors that allow a specific diagnosis of each condition are presented and the literature pertaining to such complex and unusual cases is presented.This work was supported in part by a grant from the Gastroenterology Medical Research Foundation of Southwestern Pennsylvania.  相似文献   
50.
ISSUES AND PURPOSE. To identify the ethical and legal implications of conducting research with homeless adolescents and to discuss guidelines for conducting research without parental consent.
CONCLUSIONS. Ethical principles of capacity, risk, postponement, and truthful disclosure within the context of the rights of minors to consent to healthcare treatment form the basis of the argument for allowing adolescents to consent to participate in research without parental consent when there is minimal risk or when such consent could place them at increased risk for harm.
PRACTICE IMPLICATIONS. Adolescents who are the target population for clinical research or who are intended recipients of nursing care should be involved in setting priorities, purposes, and protocols. Parents and other adults from their communities should be included in developing strategies to protect their confidentiality and privacy while helping them achieve autonomy in making informed health-related decisions.  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