接口中返回"type":"Buffer","data":[32,232,175,183,233,151,174,229,177,177,231,133,164,228,187,138,229,185,180,230,152,175,229,144,166,230,156,137,232,181,132,228,186,167,230,179,168,229,133,165,232,174,161,229,136,146,32]
这种数据是因为这个quiz_content字段使用了MEDIUMBLOG类型，换成TEXT就OK了，两者的区别参看:
MySQL中TEXT与BLOB字段类型的区别
