57.在腹部檢查中，下列何種超音波探頭適合用在體型較壯碩或肥胖的受檢者？
(A)10 MHz linear array transducer
(B)7.5 MHz sector transducer
(C)2.5 MHz curved or convex array transducer
(D)5.0 MHz curved or convex array transducer