患儿，男，6a6mo，以咳嗽5d、低热3d入院。千素经常感冒，无心悸、气促，无外伤手术史。查体：W17kg，R28次／min，HR98次／min，双侧呼吸动度一致，无叩浊，双肺可闻中细湿罗音，呼吸音无减低；心前区无隆起，心尖搏动未见，无震颤，心界向左右扩大，心律齐，心音低钝，心前区 Children, male, 6a6mo, with cough 5d, fever 3d admitted. Sen often cold, no heart palpitations, shortness of breath, no history of trauma surgery. Examination: W17kg, R28 times / min, HR98 beats / min, bilateral respiratory motion consistent, no knock turbidity, lungs can be heard in the fine wet rales, no reduction in respiratory sounds; no anterior bulging heart area, apex beat See, no tremor, to expand the heart to the left and right, heart rate Qi, low heart sound blunt, precinct area