在长时间的工作和学习中，人们常常容易打瞌睡，春夏之际尤其如此。但有些人之嗜睡本能真令人不可思议，他们如此嗜睡的原因是什么呢？不可思议的事例盖纳·卡尔，出生在英国利物浦，7岁的时候常常感觉有莫名的昏昏欲睡的念头袭来，总想打盹，“我清楚记得不论在学校还是在家里 People often fall asleep easily during long hours of work and study, especially in spring and summer. But some people’s sleep instincts are really incredible. What are the reasons they are so sleepy? The Incredible Case of Geithner Carl was born in Liverpool, England. When he was seven years old, he often felt that infamous sleepy thoughts hit him and wanted to fight. “I clearly remember whether I was at school or at home.