非贪婪的正则表达式修饰符就像它们的贪婪对应部分,但
?紧随其后:
* - zero or more*? - zero or more (non-greedy)+ - one or more+? - one or more (non-greedy)? - zero or one?? - zero or one (non-greedy)

非贪婪的正则表达式修饰符就像它们的贪婪对应部分,但
?紧随其后:
* - zero or more*? - zero or more (non-greedy)+ - one or more+? - one or more (non-greedy)? - zero or one?? - zero or one (non-greedy)