thoroughly, completely, from start to finish
彻头彻尾
Completely
— 双重赔偿 (1944)
彻头彻尾不是吗
Through and through, isn’t it?
彻头彻尾意外保险
Comprehensive accident insurance
但我们会彻头彻尾我爱你华达
But we will love you wholeheartedly. I love you, Huada.