白天瞌睡可能是老年痴呆症的征兆 Researchers know that a condition as complicated as Alzheimer’s can’t be traced to a single or simple cause. Genetic factors contribute to the degenerative brain disorder that robs people of their memory, and biological process related to aging play a role as well.But in recent years, scientists have uncovered some behaviors that may also influence Alzheimer’s risk. In the latest study published in JAMA Neurology, a group of them report how sleep — daytime sleepiness, in particular — may be an indicator of Alzheimer’s.见： Being Sleepy During the Day Could Be a Warning Sign of Alzheimer’sBeing sleepy during the day could be a warning sign of Alzheimer’sUSA Today ·Being Sleepy During the Day Could Be a Warning Sign of ...Time