病人接受CHOP的處方治療，如下： CHOP Regimen Pre-medication Dexamethasone 10 mg IV infusion 5 min, 15 min before C/T Metoclopramide 10 mg IV over 15 min, 30 min before C/T, then 10 mg IV q6h × 1 day Granisetron 2 mg PO, 60 min before C/T Chemotherapy Cyclophosphamide 750 mg/m $^{2}$ IV slowly push 3-5 min on day 1; then Doxorubicin 40 mg/m $^{2}$ IV slowly push 3-5 min on day 1; then Vincristine 1.4 mg/m $^{2}$ IV slowly push on day 1 (max. 2 mg); then Prednisolone 40 mg/m $^{2}$ /day PO bid × 5 days Allopurinol 100 mg PO tid x 5 days started on day before chemotherapy Cumulative dose of doxorubicin after this chemotherapy: 64 mg/m $^{2}$ 依序回答下列三題。