匹配整行正则表达式

1. 匹配以某字符串开头的整行正则表达式

如：“I do not expect tariffs to be something that will be on the agenda for tomorrow night,” a senior Biden administration official told reporters Sunday during a background briefing on the highly anticipated video call.

正则表达式：
^“I do not.*$

2. 匹配任意含Biden的整行

如：Asked whether Biden and Xi would discuss the current global supply chain crisis, the official said it was also “not something I expect to be a significant point of discussion.

正则表达式：
^.*Biden.*$