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   28355篇
  免费   1771篇
  国内免费   332篇
耳鼻咽喉   588篇
儿科学   301篇
妇产科学   445篇
基础医学   4937篇
口腔科学   639篇
临床医学   2137篇
内科学   4961篇
皮肤病学   984篇
神经病学   2323篇
特种医学   1949篇
外科学   4022篇
综合类   98篇
一般理论   12篇
预防医学   990篇
眼科学   829篇
药学   2690篇
中国医学   350篇
肿瘤学   2203篇
  2023年   147篇
  2022年   110篇
  2021年   758篇
  2020年   478篇
  2019年   741篇
  2018年   921篇
  2017年   734篇
  2016年   1087篇
  2015年   1535篇
  2014年   1750篇
  2013年   1941篇
  2012年   2923篇
  2011年   2692篇
  2010年   1664篇
  2009年   1406篇
  2008年   1779篇
  2007年   1785篇
  2006年   1565篇
  2005年   1315篇
  2004年   1066篇
  2003年   941篇
  2002年   774篇
  2001年   515篇
  2000年   425篇
  1999年   303篇
  1998年   132篇
  1997年   105篇
  1996年   63篇
  1995年   70篇
  1994年   51篇
  1993年   55篇
  1992年   81篇
  1991年   74篇
  1990年   70篇
  1989年   57篇
  1988年   47篇
  1987年   50篇
  1986年   27篇
  1985年   24篇
  1984年   20篇
  1983年   14篇
  1982年   9篇
  1981年   21篇
  1980年   10篇
  1979年   20篇
  1978年   16篇
  1977年   15篇
  1976年   16篇
  1975年   12篇
  1970年   7篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
The International Journal of Cardiovascular Imaging - The new version of EchoPAC platform was recently developed by General Electronics (GE) to provide ‘vendor-independent’...  相似文献   
2.
3.

Asian American immigrant (AAI) women may have suboptimal 24-h activity patterns due to traditional gender role and caregiving responsibilities. However, little is known about their objectively-measured activity. We measured AAI women’s 24-h activity patterns using accelerometry and examined cultural correlates of time in sedentary behavior (SB), light intensity physical activity (LIPA), moderate-to-vigorous physical activity (MVPA) and sleep. Seventy-five AAI women completed surveys on acculturation (years of U.S. residency and English proficiency), discrimination, and sleep quality, and 7 days of wrist- and hip-accelerometer monitoring. Linear regression was conducted controlling for age, BMI, and education. We also compared activity patterns across Asian subgroups (East, Southeast, South Asians). On average, AAI women had 33 min of MVPA, 6.1 h of LIPA, 10 h of SB, and 5.3 h of sleep per day. South Asian women had the longest SB and the shortest sleep and MVPA hours. English proficiency was negatively related to MVPA (p?=?0.03) and LIPA (p?<?0.01). Years of U.S. residency was positively related to SB (p?=?0.07). Discrimination was related to shorter (p?=?0.03) and poorer quality sleep (p?=?0.06). Culturally-tailored programs targeting SB and sleep and integrating coping strategies against discrimination could help optimize AAI women’s 24-h activity patterns.

  相似文献   
4.
5.
6.
7.
Stickler syndrome is a genetic disorder of connective tissue. One of the major symptoms associated with this disorder is an oro-facial malformation, which may cause a submucous cleft or a complete cleft of the hard palate. A 32-year-old man diagnosed with Stickler syndrome and a submucosal cleft palate (SMCP) visited our hospital with a chief complaint of excessive daytime sleepiness. The patient was diagnosed with severe obstructive sleep apnea (OSA), and administration of a polysomnography test revealed an apnea-hypopnea index (AHI) of 30.9 events/hour (h). Auto-titrating continuous positive airway pressure was initiated to control the OSA symptoms and subsequently the patient showed some improvement. However, due to continuous velopharyngeal insufficiency symptoms, intravelar veloplasty was performed. Three months after surgery, the AHI had decreased to 12.4 events/h. Recent studies have described a greater risk for OSA in individuals with cleft palate, than in the general population. The present case demonstrates surgical success in a patient with OSA and SMCP, suggesting that palatal surgery may be considered an optional surgical treatment for OSA patients with SMCP.  相似文献   
8.
9.
Clinical Oral Investigations - This study aimed to compare post-treatment stability in patients with anterior open-bite (AOB) between those treated surgically (orthognathic 2-jaw surgery) and...  相似文献   
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