患儿,女,6岁,皮瘆,3天。1周前患上呼吸道感染。体检发现四肢伸面散在紫红色斑丘疹、高出皮面、压之不褪色,可见风团,余无异常。血清IgA 3. 6g/L。:初步考虑为
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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