读北极地区某年一月海平面气压分布图(单位:百帕),若此图所示日期为一月初某日,图示区域内的黑夜范围最接近图幅的( )
A:30%
B:50%
C:70%
D:90%
—The children in rural areas have few books to read. Let's ______ some books to them.—Great, it is a good idea.