Some question are listed below : 1. blood transfusion will conduct DNA interacting in the body ( ofcause , we know some of the virus can transfer from transfusion / sex interaction) 2. Why sport can keep your blood pressure ( What kind of situation the blood pressure / blood operation ) can clear obstruction 3. Why the Glyceryl Trinitrate should be use under heart problem ? Is that the heart did not have enough blood and the Oxygen not enough the brain so need the Glyceryl Trinitrate to support ?