Thus the five groups were: (1) low salt only, (2) low salt plus grape powder, (3) high salt only, (4) high salt plus grape powder, and (5) high salt plus vasodilator hydralazine.

• 这五组是：（1）单纯低盐组，（2）低盐+葡萄粉组，（3）单纯高盐组，（4）高盐组+葡萄粉组，（5）高盐组+扩管药肼苯哒嗪组。