if (Health-Damage<=0.0f)
 {
  Health = 0.0f;
 }
 else
 {
  Health -= Damage;
 }

等价于：

FMath::Clamp(Health-Damage,0.0f,MaxHealth);

所以写成：

 Health -= Damage;
 if (Health<=0.0f)
 {
  Health = 0.0f;

  //Todo：Died（）；
 }
 return Health;