―Must I report the situation of the new company to the manager now?

―No, you         . You are tired and you can do it after you have a good rest.

A．mustn’t

B．needn’t

C．shouldn’t

D．can’t

综合反映人群健康状况的指标是

A．净再生育率
B．生命素质指数(PQLI)
C．伤残调整生命年(DALY)
D．年龄别低身高比例
E．新生儿低体重比例