wèi / le / bǎo / zhù / yì / jiā / rén / de / shēn / jiā / xìng / mìng / tā / jué / dìng / lì / kè / lí / kāi / zhè / zuò / chéng / shì

为了保住一家人的身家性命，他决定立刻离开这座城市。

To protect his family's lives and property, he decided to leave the city immediately.