School absenteeism can be a marker for poor medical care, or for inadequate management of a chronic illness, like asthma.

缺课可能由于是对孩子医疗护理不够，对慢性病，如哮喘没有引起足够的重视。

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While school districts track general attendance, few track chronic absenteeism in prekindergarten or later.

WSJ: Districts find youngest students among most absent