How can you express one thing in such cold blood?

This sentence means how can you be so heartless and heartless. It reflects a person's dissatisfaction with other people's behavior and inner disappointment, and each of us should be kind to others.

Be full of enthusiasm and love for people and things, don't treat people and things around you with cold eyes, and sincerely consider the problem from the other side's point of view. Only in this way can we understand and respect each other and live better and better.