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   72018篇
  免费   4998篇
  国内免费   202篇
耳鼻咽喉   529篇
儿科学   2093篇
妇产科学   1166篇
基础医学   9865篇
口腔科学   1505篇
临床医学   7544篇
内科学   15388篇
皮肤病学   981篇
神经病学   6826篇
特种医学   2239篇
外国民族医学   1篇
外科学   10070篇
综合类   878篇
一般理论   72篇
预防医学   6393篇
眼科学   1737篇
药学   4916篇
  1篇
中国医学   80篇
肿瘤学   4934篇
  2023年   376篇
  2022年   523篇
  2021年   1399篇
  2020年   842篇
  2019年   1365篇
  2018年   1660篇
  2017年   1241篇
  2016年   1358篇
  2015年   1590篇
  2014年   2373篇
  2013年   3215篇
  2012年   5251篇
  2011年   5376篇
  2010年   3003篇
  2009年   2668篇
  2008年   4884篇
  2007年   5341篇
  2006年   5254篇
  2005年   4982篇
  2004年   4774篇
  2003年   4317篇
  2002年   4221篇
  2001年   587篇
  2000年   422篇
  1999年   652篇
  1998年   907篇
  1997年   762篇
  1996年   642篇
  1995年   612篇
  1994年   503篇
  1993年   468篇
  1992年   371篇
  1991年   321篇
  1990年   273篇
  1989年   262篇
  1988年   270篇
  1987年   225篇
  1986年   238篇
  1985年   255篇
  1984年   312篇
  1983年   329篇
  1982年   388篇
  1981年   371篇
  1980年   348篇
  1979年   198篇
  1978年   244篇
  1977年   195篇
  1976年   135篇
  1975年   105篇
  1974年   107篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
This state-of-the-art review presents the latest evidence and the current status of autogenous soft tissue grafting for soft tissue augmentation and recession coverage at teeth and dental implant sites. The indications and predictability of the free gingival graft and connective tissue graft (CTG) techniques are highlighted, together with their expected clinical and esthetic outcomes. CTGs can be harvested from the maxillary tuberosity or from palate with different approaches that can have an impact on graft quality and patient morbidity. The influence of CTGs on soft tissue thickness and keratinized tissue width are also discussed.  相似文献   
992.
993.
HIV infection continues to be one of the world's greatest pandemics, affecting nearly every country on the globe. By September 2018, it is estimated that 38 million people were living with HIV, 30 million people are aware of their status, and 23 million people are taking anti‐retroviral therapy (8 million in 2010). Thus, currently 8 million people living with HIV are not aware that they are HIV‐positive and 15 million persons are not being treated. There are nearly 15 million orphans (aged 0–17). There is widespread inequality both in the prevalence of HIV infection and in the access to therapy. However, although the number of people living with HIV continues to increase, the number of new infections shows a steady decrease over the last 9 years and in 2018 was 1.7 million. Deaths from AIDS in 2018 also decreased to 750,000 from 1.2 million in 2010. The world prevalence of HIV is about 0.23% but is over 0.3% in South‐East Asia, Latin America, North America and Eastern Europe and with particularly high prevalence in the Caribbean (1.1%) and sub‐Saharan Africa (5.5%). It is approximately 0.5% in Indonesia. There were approximately 5,000 new HIV infections (adults and children) a day during 2018. About 61% were in sub‐Saharan Africa, nearly 50% were in females and 500 were in children. HIV therapy seems to have had a global impact, with AIDS‐related deaths decreasing by 33% since 2010, and new infections decreasing by 16%. Nevertheless, the majority of the world's HIV is in low and middle resource countries and social determinants are strongly related. Many people living with HIV or at risk for HIV still do not have access to prevention, care and treatment, and there is still no cure.  相似文献   
994.
995.
Avulsion of permanent teeth is one of the most serious dental injuries. Prompt and correct emergency management is essential for attaining the best outcome after this injury. The International Association of Dental Traumatology (IADT) has developed these Guidelines as a consensus statement after a comprehensive review of the dental literature and working group discussions. It represents the current best evidence and practice based on that literature search and expert opinions. Experienced researchers and clinicians from various specialties and the general dentistry community were included in the working group. In cases where the published data did not appear conclusive, recommendations were based on consensus opinions or majority decisions of the working group. They were then reviewed and approved by the members of the IADT Board of Directors. The purpose of these Guidelines is to provide clinicians with the most widely accepted and scientifically plausible approaches for the immediate or urgent care of avulsed permanent teeth. The IADT does not, and cannot, guarantee favorable outcomes from adherence to the Guidelines. However, the IADT believes that their application can maximize the probability of favorable outcomes.  相似文献   
996.
997.
American Journal of Cardiovascular Drugs - Despite the widespread use of statins in the setting of high cardiovascular risk, many patients continue to experience clinical events. This highlights...  相似文献   
998.
999.
1000.
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