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   5471103篇
  免费   414880篇
  国内免费   16228篇
耳鼻咽喉   77576篇
儿科学   177421篇
妇产科学   148858篇
基础医学   806915篇
口腔科学   154875篇
临床医学   501768篇
内科学   988523篇
皮肤病学   130930篇
神经病学   445077篇
特种医学   212492篇
外国民族医学   1114篇
外科学   830542篇
综合类   157865篇
一般理论   3022篇
预防医学   452821篇
眼科学   133873篇
药学   391246篇
  28篇
中国医学   14838篇
肿瘤学   272427篇
  2021年   45083篇
  2019年   58752篇
  2018年   76614篇
  2017年   58769篇
  2016年   65064篇
  2015年   77179篇
  2014年   112257篇
  2013年   178409篇
  2012年   161390篇
  2011年   173910篇
  2010年   137648篇
  2009年   134833篇
  2008年   157785篇
  2007年   170582篇
  2006年   176605篇
  2005年   171296篇
  2004年   170825篇
  2003年   159404篇
  2002年   147414篇
  2001年   223167篇
  2000年   220947篇
  1999年   193984篇
  1998年   73785篇
  1997年   67143篇
  1996年   64925篇
  1995年   65571篇
  1994年   59681篇
  1993年   55044篇
  1992年   144713篇
  1991年   140137篇
  1990年   134909篇
  1989年   131592篇
  1988年   121105篇
  1987年   118632篇
  1986年   112086篇
  1985年   109253篇
  1984年   86965篇
  1983年   76092篇
  1982年   54471篇
  1981年   50127篇
  1980年   46955篇
  1979年   77419篇
  1978年   59237篇
  1977年   51360篇
  1976年   48051篇
  1975年   49545篇
  1974年   56920篇
  1973年   54796篇
  1972年   51568篇
  1971年   48032篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
American Indian and Alaska Native (AIAN) individuals are diverse culturally and geographically but share a high prevalence of chronic illness, largely because of obstacles to high-quality health care. The authors comprehensively examined cancer incidence and mortality among non-Hispanic AIAN individuals, compared with non-Hispanic White individuals for context, using population-based data from the National Cancer Institute, the Centers for Disease Control and Prevention, and the North American Association of Central Cancer Registries. Overall cancer rates among AIAN individuals were 2% higher than among White individuals for incidence (2014 through 2018, confined to Purchased/Referred Care Delivery Area counties to reduce racial misclassification) but 18% higher for mortality (2015 through 2019). However, disparities varied widely by cancer type and geographic region. For example, breast and prostate cancer mortality rates are 8% and 31% higher, respectively, in AIAN individuals than in White individuals despite lower incidence and the availability of early detection tests for these cancers. The burden among AIAN individuals is highest for infection-related cancers (liver, stomach, and cervix), for kidney cancer, and for colorectal cancer among indigenous Alaskans (91.3 vs. 35.5 cases per 100,000 for White Alaskans), who have the highest rates in the world. Steep increases for early onset colorectal cancer, from 18.8 cases per 100,000 Native Alaskans aged 20–49 years during 1998 through 2002 to 34.8 cases per 100,000 during 2014 through 2018, exacerbated this disparity. Death rates for infection-related cancers (liver, stomach, and cervix), as well as kidney cancer, were approximately two-fold higher among AIAN individuals compared with White individuals. These findings highlight the need for more effective strategies to reduce the prevalence of chronic oncogenic infections and improve access to high-quality cancer screening and treatment for AIAN individuals. Mitigating the disparate burden will require expanded financial support of tribal health care as well as increased collaboration and engagement with this marginalized population.  相似文献   
2.
3.
4.
AIDS and Behavior - Although misperceived norms often drive personal health behaviors, we do not know about this phenomenon in the context of antiretroviral therapy (ART) adherence. We conducted a...  相似文献   
5.
Spindler  L.  Alam  A.  Fathallah  N.  Rentien  A.-L.  Draullette  M.  Pommaret  E.  Thierry  M.-L.  Mituialy  A. El  Abbes  L.  Aubert  M.  Benfredj  P.  Far  E. Safa  Beaussier  H.  de Parades  V. 《Techniques in coloproctology》2022,26(2):143-146
Techniques in Coloproctology - The aim of our study was to assess the efficacy of sinus laser therapy (SiLaT) for the treatment of pilonidal disease. All adult patients treated with SiLaT in our...  相似文献   
6.
Clinical Rheumatology - To examine the mortality rates and causes of death among French decedents with Behçet’s disease (BD). Data collected between 1979 and 2016 by the French...  相似文献   
7.
Coates  Laura C.  Mease  Philip  Kronbergs  Andris  Helt  Cameron  Sandoval  David  Park  So Young  Combe  Bernard  Nash  Peter  Deodhar  Atul 《Clinical rheumatology》2022,41(10):3035-3047
Clinical Rheumatology - To evaluate the three-year efficacy and safety of ixekizumab with and without concomitant conventional synthetic disease-modifying antirheumatic drug (csDMARD) use in...  相似文献   
8.
Clinical Rheumatology - This study aimed to assess treatment patterns and frequency of inadequate response associated with advanced therapy initiation among patients with ankylosing spondylitis...  相似文献   
9.
The International Journal of Cardiovascular Imaging - Global longitudinal strain (GLS) has proven to be a powerful prognostic marker in various patient populations, but the prognostic value of...  相似文献   
10.

There are few published procedures for teaching athletic skills to children with autism spectrum disorder (ASD). This study used a multiple baseline across participants design to evaluate the effects of prompting, demand fading, and differential reinforcement, on the basketball shooting skills of four school-aged boys diagnosed with ASD. During baseline, all four boys rarely made correct and accurate baskets at the regulation height and distance for their age-group in youth basketball. Following intervention, all four boys increased their percentage of correct shots and accuracy, compared to baseline, and their shooting skills transferred to the game of “P-I-G” with peers.

  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