thE kEy oF thE unitED stAtEs mEDiCAl poliCy is ______.
A．to EstABlish morE ChilD hEAlth CEntErs
B．to mAkE EFForts to kEEp DisEAsEs From hAppEning
C．to grAnt morE FunDs to trAin morE pArA-proFEssionAls
D．to put EmphAsEs on proDuCing morE EFFECtivE mEDiCinEs