?顺便拜访

... look into 调查 look in on 顺便拜访 look back (on) 回顾 ...

?短暂拜访某人

... logged in adj (computing: connected) 计算机 登录的，登入的 look in on 短暂拜访某人 look sb in the eye （坦然）直视某人 ...

?照看

... look as if butter would not melt in one's mouth 看来一本正经... look in on 照看，照顾 look in at 顺便探访 ...

?短时间内探访

... look into one’s eyes 直视某人 look in on 短时间内探访 look on 旁观，观看 ...