33.下列何者可固定心臟並可防止其過度充血?(A)心內膜(endocardium)(B)漿膜性心包膜壁層(parietal layer of serous pericardium)(C)漿膜性心包膜臟層(visceral layer of serous pericardium)(D)纖維性心包膜(fibrous pericardium)