tā / shì / gè / shuǎng kuài rén / zhǐ yào / dā yīng / de / shì / èr huà / bù shuō / jiù / qù / zuò

他是个爽快人，只要答应的事，二话不说就去做。

He is a straightforward guy; once he promises something, he does it without any objection.