关于急性蜂窝织炎治疗措施中不正确的是

A．局部制动，抬高患肢

B．选用磺胺药，抗生素等控制感染

C．已形成脓肿，需切开引流

D．口底及颌下蜂窝组织炎，经短期抗炎治疗无效等待化脓后切开引流

E．加强支持，可行理疗

_____ the city’s public school system should be open to the children of migrant workers has become the focus of discussion.

A．Whether

B．What

C．That

D．If