mallid,商品ID,
seller,卖家,
scomment,卖家评论,
s1,卖家评1星,
s2,卖家评2星,
s3,卖家评3星,
s4,卖家评4星,
s5,卖家评5星,
buyer,买家,
bcomment,买家评论,
b1,买家评1星,
b2,买家评2星,
b3,买家评3星,
b4,买家评4星,
b5,买家评5星,