下列各句运用的修辞方法与其他三项不同的一项是（ ）

25．James Williams is my favorite professor; his speech is always brief, clear and_____the point

People who cannot _____ between colours are said to becolour-blind.

The best way of ______ the problem is to ask the teacher for help.

athy, in my opinion, is very __________.— Absolutely! She prefers home life to going out.