患儿,女,2岁,因肝脾大,面部皮肤粗糙,X线片示多发骨骼发育不良,尿黏多糖阳性,特异性的酶活性测定诊断为黏多糖病,下列正确的是
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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