第二點是收到禮物必須馬上打開。這在我們的觀念裡反而是一種不禮貌的表現，

第二點是收到禮物必須馬上打開。這在我們的觀念裡反而是一種不禮貌的表現，除非得到對方的允許或是要求。

結果 (英文) 1:

The second point is to receive gifts must be opened immediately. This is where our ideas but rather a rude expression, unless the other party allows or requires.

結果 (英文) 2:

The second point is that the gift must be opened immediately. This is an impolite expression in our view, unless it is allowed or requested by the other party.

結果 (英文) 3:

The second point is that you must open the gift as soon as you receive it. This is a kind of impolite expression in our concept, unless we get the permission or request of the other party.