患儿,男,5月龄,因“发热4 d,呕吐、嗜睡1 d”入院。4d前患儿无明显诱因出现发热,体温最高达37.8℃,口服退热药物后仍反复发热,伴易惊及肢体抖动。入院前1 d出现呕吐7~8次,为胃内容物,非喷射性。小便量少,12 h仅排尿1次。伴嗜睡、精神差、乏力、叹气,易惊及肢体抖动较前频繁。在 Children, male, 5 months old, due to “fever 4 d, vomiting, lethargy 1 d” admission. 4d before the child had no obvious incentive to fever, body temperature up to 37.8 ℃, repeated fever after oral antipyretics, with easy to shake and limb jitter. 1 d before admission, vomiting 7 to 8 times for the stomach contents, non-jet. Small amount of urine, urination only once 12 h. With drowsiness, poor spirit, weakness, sighs, easy to shock and limbs jitter than before. in