题目

People from East Asia tend to have more difficulty than those from Europe in distinguishing facial expressions — and a new report published online in Current Biology explains why.Rachael Jack, University of Glasgow researcher, said that rather than scanning evenly (均匀的) across a face as Westerners do, Easterners fix their attention on the eyes.“We show that Easterners and Westerners look at different face features to read facial expressions,” Jack said. “Westerners look at the eyes and the mouth in equal measure, whereas Easterners favor the eyes and neglect (忽略) the mouth.设函数且)，若，则的值等于