【名词&注释】
病毒感染(virus infection)、复发性(recurrent)、心脏病(heart disease)、营养不良(malnutrition)、右心室(right ventricle)、肺动脉干(pulmonary trunk)、右下肺动脉(right inferior pulmonary artery)
[单选题]下列关于诊断慢性肺源性心脏病时胸部X线下所见的描述中,错误的是()
A. A.右下肺动脉(right inferior pulmonary artery)干(pulmonary trunk)扩张,其横径≥15mm
B. B.右下肺动脉(right inferior pulmonary artery)干(pulmonary trunk)横径与气管横径比≥1.07
C. C.肺动脉段明显突出或其高度≥3mm
D. D.右心室增大
E. E.心脏向左下扩大