病人,男,4岁。母乳喂养期间常有溢乳,人工喂养后出现腹部膨隆,哭闹不安,呕吐胃内容物,有时伴黄色胆汁样液体,每日呕吐1次,持续至今,多于下午发作。呕吐后腹胀明显减轻,无发热、咳嗽,大便量少、干结,小便正常。体检:智力发育差,营养不良,体瘦小,身高86cm,体重10.5kg,慢性病容,轻 Patient, male, 4 years old. Breastfeeding often galactorrhea, after artificial feeding bulging belly, crying uneasy, vomiting stomach contents, sometimes accompanied by yellow bile-like liquid, daily vomiting 1, until now, more than the onset of the afternoon. Vomiting significantly reduced abdominal distension, no fever, cough, stool less, dry knot, normal urine. Physical examination: poor mental development, malnutrition, body thin, height 86cm, weight 10.5kg, chronic disease, light