如果代数式4x-3有意义,则x的取值范围是( ).
—Simon, what do I need to take for the hiking?
—You'd better ________ more water than usual. It's hot today.
如图,点A是反比例函数y=4X(x>0)的图象上的一点,且点A的横坐标为2,连接OA并延长到点B,使AB=OA,过点B作x轴和y轴的垂线,垂足分别为C,D,则图中阴影部分的面积为( )