方法以写字或用筷子等天生惯用左手为标准，对7 468名河南新乡地区大学生（其中男性3 380人，女性4 088人左撇子进行调查）。

Methods According to the standard method that left-handers usually use the left hand when they write or eat, 7 468 undergraduates samples including 3 380 males and 4 088 females, were interviewed.

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