At a half-dozen schoolyards across the region, where the jagged pilesof former classrooms are encircled by undamaged apartment buildings,the parents came Sunday to grieve, and to demand answers.

• 在半打以上的校园整个地区，那里的锯齿状桩前的教室包围完好无损的公寓楼，家长来到周日，以悼念，并要求答复。