Upon arriving home from a business trip, dad asked mum about my academic performance at high school and then _____ of my little sister, who was in junior school.

A．one

B．it

C．that

D．the one

男性，18岁。2个月前因急性脓胸经多次胸腔穿刺抽脓及抗菌治疗后，仍有低热、消瘦，胸部 X片右胸仍可见有包裹性脓腔，入院后行胸腔闭式引流术，每日引流脓液30～50ml。胸片及胸部CT显示右下胸部有一10cm×6cm残腔，壁厚约2mm，未见钙化，肺内未见病变，进一步治疗应选择

A．继续改进胸腔引流

B．将闭式引流改为开放引流

C．胸膜纤维板剥除术

D．胸膜肺切除术

E．改进全身情况，消除中毒症状和营养不良