PM2.5是指大气中直径小于或等于2.5微米的颗粒物，也称为可吸入肺颗粒物，如图是根据某地某日早7点至晚8点甲、乙两个PM2.5监测点统计的数据（单位：毫克/每立方米）列出的茎叶图，则甲、乙两地浓度的方差较小的是（ ）
He _______ his homework already and now he is watching TV.
It's said that a young girl took the old lady to the hospital.
