您将需要使用向后看，看看对字符串和空白的字符开始/结束提前匹配您。要匹配不一定会触发通常的字边界规则

You will need to use look behind and look ahead matches on beginning / end of string and whitespace as the characters you are trying to match won't necessarily trigger the usual word boundary rules.

使用（小于= ^ | \s？）：D （= $ | \s？）这个模式应该为所有的比赛如的工作（小于= ^ | \s？）：\）（= $ | \s）

use(?<=^|\s):d(?=$|\s) this pattern should work for all of your matches eg (?<=^|\s):\)(?=$|\s)