彻底搜查

• The school was placed under lockdown until police had searched the building and determined there was no further threat to students , said patti holmgren , spokeswoman for the school system
  教育系统女发言人帕蒂?霍蒙格林说，警方彻底搜查了学校并确认没有进一步的危险，在此之前学校一直处于关闭状态。