Translation of "wisely" into Japanese

It is wise to save money for a rainy day.

万一の場合に備えて貯金するのは賢明だ。

Some wise guy left the milk out of the refrigerator all night.

どこかのお利口さんが一晩中ミルクを冷蔵庫から出しっぱなしにしておいたな。

A prudent bird chooses its tree. A wise servant chooses his master.

用心深い鳥は木を選ぶ。思慮深い従者は主を選ぶ。