一般6岁以上的儿童，一般用成人量的E．

A. Ten per cent less body weight means ten per cent less risk of heart disease and high b1ood pressure？
B. Thirteen per cent more body weight means ten per cent more risk of heart disease and high blood pre88ure．
C. The more body weight one gain8，the more risk of heart disease and high blood pressure he has．
D. The less body weight one gains，the more risk of heart disease and the less risk of high blood pressure he has．

A. Na+
B. Ca2+
C1-
D. Mg2+
E. K+