下列运算正确的是( )
A:a2+a3=a5
B:(﹣2x)3=﹣2x3
C:2+8=32
D:(a﹣b)(﹣a+b)=﹣a2﹣2ab﹣b2
After receiving the news, immediate ______ was taken by the local government to stop the disease spreading.