Everyone has the possibility of a sudden heart attack. Preventing a sudden heart attack should not be a "patent" for those with a history of heart disease. Only those who survive the first sudden heart attack can be "lucky" "Ground has its own history of heart disease. Based on this, can it be launched? ['If a person can "fortunately" have their own history of heart disease, then he must have survived the first sudden attack of heart disease.', 'If a person can "fortunately" have a history of his heart disease, then he must not have survived his first sudden heart attack.', 'People without a history of heart disease do not need to prevent a sudden heart attack.', 'Only by guarding against a sudden heart attack can you survive the sudden heart attack.']