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   75690篇
  免费   5424篇
  国内免费   163篇
耳鼻咽喉   608篇
儿科学   2816篇
妇产科学   2490篇
基础医学   9220篇
口腔科学   1018篇
临床医学   13251篇
内科学   13495篇
皮肤病学   1132篇
神经病学   6953篇
特种医学   1370篇
外国民族医学   33篇
外科学   6452篇
综合类   974篇
一般理论   129篇
预防医学   10613篇
眼科学   890篇
药学   4246篇
  1篇
中国医学   103篇
肿瘤学   5483篇
  2023年   446篇
  2022年   641篇
  2021年   1439篇
  2020年   1050篇
  2019年   1720篇
  2018年   1926篇
  2017年   1347篇
  2016年   1575篇
  2015年   1705篇
  2014年   2282篇
  2013年   3686篇
  2012年   5208篇
  2011年   5488篇
  2010年   2955篇
  2009年   2741篇
  2008年   4921篇
  2007年   5485篇
  2006年   5313篇
  2005年   5116篇
  2004年   4931篇
  2003年   4685篇
  2002年   4411篇
  2001年   613篇
  2000年   460篇
  1999年   612篇
  1998年   998篇
  1997年   762篇
  1996年   687篇
  1995年   596篇
  1994年   571篇
  1993年   563篇
  1992年   395篇
  1991年   334篇
  1990年   317篇
  1989年   285篇
  1988年   270篇
  1987年   266篇
  1986年   248篇
  1985年   294篇
  1984年   296篇
  1983年   311篇
  1982年   384篇
  1981年   362篇
  1980年   305篇
  1979年   176篇
  1978年   165篇
  1977年   176篇
  1976年   161篇
  1975年   140篇
  1974年   127篇
排序方式: 共有10000条查询结果,搜索用时 27 毫秒
1.
2.

Background

Physicians treating nonvalvular atrial fibrillation (AF) assess stroke and bleeding risks when deciding on anticoagulation. The agreement between empirical and physician-estimated risks is unclear. Furthermore, the association between patient and physician sex and anticoagulation decision-making is uncertain.

Methods

We pooled data from 2 national primary care physician chart audit databases of patients with AF (Facilitating Review and Education to Optimize Stroke Prevention in Atrial Fibrillation and Coordinated National Network to Engage Physicians in the Care and Treatment of Patients with Atrial Fibrillation Chart Audit) with a combined 1035 physicians (133 female, 902 male) and 10,927 patients (4567 female and 6360 male).

Results

Male physicians underestimated stroke risk in female patients and overestimated risk in male patients. Female physicians estimated stroke risk well in female patients but underestimated the risk in male patients. Risk of bleeding was underestimated in all. Despite differences in risk assessment by physician and patient sex, > 90% of patients received anticoagulation across all subgroups. There was modest agreement between physician estimated and calculated (ie, CHADS2 score) stroke risk: Kappa scores were 0.41 (0.35-0.47) for female physicians and 0.34 (0.32-0.36) for male physicians.

Conclusions

Our study is the first to examine the association between patient and physician sex influences and stroke and bleeding risk estimation in AF. Although there were differences in agreement between physician estimated stroke risk and calculated CHADS2 scores, these differences were small and unlikely to affect clinical practice; further, despite any perceived differences in the accuracy of risk assessment by sex, most patients received anticoagulation.  相似文献   
3.
Ninety-seven inpatients with tardive dyskinesia (average AIMS score = 13), the majority of whom were schizophrenic, were studied. Forty patients were Caucasian, and 57 were African-American. The APOE genotypes of these patients were compared to previously published genotypes of controls and with previously published studies of APOE genotypes in patients with schizophrenia. There were no significant differences in APOE allele frequencies comparing the African-American tardive dyskinesia population and the African-American control groups. In contrast, significant (< 0.05) P values were obtained comparing the Caucasian tardive dyskinesia population to the Caucasian controls, when comparing allele frequencies and genotypic frequencies. This study suggests that Caucasians bearing an APOE2 allele are at increased risk of developing tardive dyskinesia, whereas African-Americans are not. APOE genotype-specific risks of both tardive dyskinesia and Alzheimer's disease that vary across populations could be due to recruitment of patients or controls or could be due to modifying effects of differing genetic or environmental backgrounds. The mechanism by which the APOE2 allele increases risk of tardive dyskinesia is not known. Further information about the mechanisms of increased risk of tardive dyskinesia could result in stratification of prescribing practices weighing the costs of medications against the relative risk of side effects.  相似文献   
4.
5.
This is the third and final part of a series of articles that report the findings of a study that investigated the effects of a summer externship program on the transition into a professional role among nurses who participated in a summer nurse externship program at an acute care pediatric hospital. Specifically, this article reports the retention and recruitment benefits of a summer nurse externship program for the institution from 1998 through 2003. A total of 153 externs out of the 193 (79.0%) assumed a registered nurse position at the institution, and 77% remained in that role for 12 months. Overall, the nurse extern program for this institution appeared to be an effective recruitment and retention strategy that is on par with the institution and national data for retention and turnover data.  相似文献   
6.
7.
Fetal scalp blood sampling (FSBS), in conjunction with fetal heart rate monitoring, is a method of fetal surveillance that may avoid cesarean delivery of the healthy fetus or indicate the need for immediate delivery of a compromised fetus. Some researchers have recently begun to question the efficacy of FSBS. In this article, three nurse-midwives discuss FSBS as a tool in assessing fetal well-being during labor and consider whether FSBS is a nurse-midwifery procedure.  相似文献   
8.
9.
10.
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