A firm has average days of receivables outstanding of 22 compared to an industry average of 29 days. An analyst would most likely conclude that the firm:（）

A. may have credit policies that are too strict.

B. makes less credit sales than the average firm in its industry.

C. has a lower cash conversion cycle than its peer companies.

关于早产的描述，以下哪项恰当

A．早产的临产与足月妊娠的临产诊断标准不同

B．一旦诊断早产．均应及时给予抑制宫缩药物

C．早产与新生儿呼吸窘迫综合征无关系

D．卧床休息对治疗早产无帮助

E．分娩时应及时行会阴切开防止新生儿颅内出血