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   10354篇
  免费   565篇
  国内免费   78篇
耳鼻咽喉   119篇
儿科学   234篇
妇产科学   186篇
基础医学   1349篇
口腔科学   262篇
临床医学   1048篇
内科学   2436篇
皮肤病学   123篇
神经病学   1204篇
特种医学   361篇
外科学   1680篇
综合类   13篇
预防医学   298篇
眼科学   143篇
药学   628篇
中国医学   12篇
肿瘤学   901篇
  2023年   56篇
  2022年   151篇
  2021年   220篇
  2020年   135篇
  2019年   184篇
  2018年   257篇
  2017年   215篇
  2016年   255篇
  2015年   236篇
  2014年   364篇
  2013年   503篇
  2012年   786篇
  2011年   718篇
  2010年   407篇
  2009年   393篇
  2008年   689篇
  2007年   660篇
  2006年   697篇
  2005年   669篇
  2004年   697篇
  2003年   609篇
  2002年   514篇
  2001年   109篇
  2000年   83篇
  1999年   88篇
  1998年   118篇
  1997年   87篇
  1996年   95篇
  1995年   82篇
  1994年   71篇
  1993年   73篇
  1992年   72篇
  1991年   71篇
  1990年   53篇
  1989年   62篇
  1988年   39篇
  1987年   37篇
  1986年   39篇
  1985年   39篇
  1984年   40篇
  1983年   33篇
  1982年   43篇
  1981年   33篇
  1980年   30篇
  1979年   18篇
  1978年   18篇
  1977年   14篇
  1975年   12篇
  1974年   12篇
  1971年   12篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
992.
Oral and Maxillofacial Surgery - The radial forearm free flap (RFFF) remains a workhorse in microsurgical reconstruction. Its failure is primarily due to problems with venous drainage; for this...  相似文献   
993.
Increased human life expectancy broadens the alternatives for missing teeth and played a role in the widespread use of dental implants and related augmentation procedures for the aging population. Though, many of these patients may have one or more diseases. These systemic conditions may directly lead to surgical complications, compromise implant/bone healing, or influence long-term peri-implant health and its response to biologic nuisances. Offering patients credible expectations regarding intra- and postoperative complications and therapeutic prognosis is an ethical and legal obligation. Clear identification of potential types of adverse effects, complications, or errors is important for decision-making processes as they may be related to different local, systemic, and technical aspects. Therefore, the present review structures the underlying biological mechanisms, clinical evidence, and clinical recommendations for the most common systemic risk factors for implant-related complications.  相似文献   
994.
995.
Fetal intracranial hemorrhage (ICH) may result from a wide array of causes, either associated with maternal or fetal risk factors. In the last decade, monogenic causes of susceptibility to fetal ICH have been described, in particular in association with COL4A1 and COL4A2 genes. A peculiar form of ICH is acute necrotizing encephalitis (ANE), which is characterized by a rapid-onset severe encephalopathy following an abnormal inflammatory response to an otherwise banal infection. It usually affects healthy children and it is thought to be multifactorial, with a genetic predisposition. RANBP2 gene has been extensively associated with ANE susceptibility. We hereby present a unique case of a 42-year-old secundigravida with intrauterine fetal demise at 35 weeks of gestation. Trio-based whole-exome sequencing performed on both parents and fetal DNA showed a de novo likely pathogenic variant in the RANBP2 gene on 2q13. At the fetal autopsy, subtentorial hematoma and cerebral intraparenchymal hemorrhage were present. We speculate that this might be a new phenotypic presentation of RANBP2-associated disease. However, more similar fetal cases need to be reported in order to reinforce this hypothesis.  相似文献   
996.

Background

With ageing, comorbidities such as neurocognitive impairment increase among people living with HIV (PLWH). However, addressing its multifactorial nature is time-consuming and logistically demanding. We developed a neuro-HIV clinic able to assess these complaints in 8 h using a multidisciplinary approach.

Methods

People living with HIV with neurocognitive complaints were referred from outpatient clinics to Lausanne University Hospital. Over 8 h participants underwent formal infectious disease, neurological, neuropsychological and psychiatric evaluations, with opt-out magnetic resonance imaging (MRI) and lumbar puncture. A multidisciplinary panel discussion was performed afterwards, with a final report weighing all findings being produced.

Results

Between 2011 and 2019, a total of 185 PLWH (median age 54 years) were evaluated. Of these, 37 (27%) had HIV-associated neurocognitive impairment, but they were mainly asymptomatic (24/37, 64.9%). Most participants had non-HIV-associated neurocognitive impairment (NHNCI), and depression was prevalent across all participants (102/185, 79.5%). Executive function was the principal neurocognitive domain affected among both groups (75.5% and 83.8% of participants impaired, respectively). Polyneuropathy was found in 29 (15.7%) participants. Abnormalities in MRI were found in 45/167 participants (26.9%), being more common among NHNCI (35, 77.8%), and HIV-1 RNA viral escape was detected in 16/142 participants (11.2%). Plasma HIV-RNA was detectable in 18.4% out of 185 participants.

Conclusions

Cognitive complaints remain an important problem among PLWH. Individual assessment from a general practitioner or HIV specialist is not enough. Our observations show the many layers of HIV management and suggest that a multidisciplinary approach could be helpful in determining non-HIV causes of NCI. A 1-day evaluation system is beneficial for both participants and referring physicians.  相似文献   
997.
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