Sleep Encyclopedia of Type O Blood

Interesting talk about blood type: ( blood type and personality http:///xx/)

People with type O blood have an enviable "special function", which is the sleep control mechanism. Their sleep seems to have an intelligent alarm clock to monitor at all times, and they can control themselves as needed. The most common example is, for example, An O-blood office worker is very tired at work and may often sleep soundly on the bus, but he can always wake up in time at the right time, and he almost never misses getting on and off the station.