黑便()
呕血()
心悸乏力等周身表现()

A．成人每日消化道出血量＞5～10ml

B．成人每日消化道出血量50～100ml

C．胃内储积血量在250～300ml

D．一次出血量＜400ml

E．出血量＞400～500ml

The Customs shall reply in writing within （） from the date of receipt of the application for the refund of the duty paid and notify the applicant of its decision.

A. one month

B. two months

C. three months

D. six months