充足的睡眠能促进记忆巩固，提升注意力，增强身体免疫力。大奉打更人洛玉衡绿版苗有方

　　Sleep has long been regarded as nothing more than a way to charge our batteries. But what if it can control our weight, allow us to make memories, and help us to fight off diseases like Alzheimer’s? We travel the world to investigate how revolutionary new technology has revealed the sleeping brain as an energetic and purposeful machine.