word   norm_name  allowed_order
大于      >          after
>        >          after
大于等于  >=         after
大于或等于 >=        after
大于或者等于 >=      after
不小于   >=         after
小于    <          after
<       <         after
小于等于  <=         after
小于或等于 <=         after
小于或者等于  <=      after
不大于    <=         after
>=     >=           after
<=     <=           after
=     =             after
等于   =            after
以内   <           before
以上   >           before
前   +TOP          after
最大  +TOP        after,before,null
最小  -TOP        after,before,null
