according to 和 as per在用法上有什么区别,请高手赐教,

两个短语都是“根据,按照”的意思.但是,as per更加正式、商务一些,例如：
Identify root cause of any quality issues,
provide timely response to the customer and track actions are completed as per plan.全句意思为：找出任何质量问题的根本原因,对顾客要求及时作出反应并根据要求完成追踪行动.
而according to 则更日常化一些,如：
According to his habit,he turned his back upon her and began to snore.
根据他的习惯,他背朝她,开始打起鼾来.