<image>As shown in the figure, in Rt△ABC, ∠C = 90.0, ∠A = 30.0, BC = 2.0, the radius of ⊙C is 1.0, point P is the point on the hypotenuse AB, passing point P is a tangent PQ of ⊙C (Point Q is the tangent point), then the minimum value of the line segment PQ is ()