当患者处于缺氧且二氧化碳滞留状态时,为改善患者呼吸功能,应给予患者 A.
低流量、低浓度吸氧 B.
高流量、高浓度吸氧 C.
吸氧但浓度小于25% D.
有创呼吸机辅助呼吸 E.
无创呼吸机辅助呼吸

A．Return some inventory which had been purchased for cash and obtain a full refund on the cost
B．Make a bulk purchase of inventory for cash to obtain a large discount
C．Offer early payment discounts in order to collect receivables more quickly
D．Make an early payment to suppliers, even though the amount is not due