Fukuzawa gives Rampo a pair of glasses, claiming that wearing them would activate his ability to instantly determine the truth of any situation, and taking them off would give him the ability to tolerate the stupidity of the ordinary person.
That was because you'd just drawn blood.
.ذلك لأنّك نزفت الدّم
Das lag daran, dass du
gerade Blut abgenommen hattest.
On venait de vous prélever
beaucoup de sang.
Questo perché ti avevano appena 
prelevato del sangue.
Era porque tinha
acabado de tirar sangue.
Потому что пустил себе кровь.