我是xml解析的新手。Thisxmlfile有以下树:FHRSEstablishment|-->Header||-->...|-->EstablishmentCollection||-->EstablishmentDetail|||-->...||-->Scores|||-->...|-->EstablishmentCollection||-->EstablishmentDetail|||-->...||-->Scores|||-->...但是当我使用ElementTree访问它并查找child标签和属性时，importxml.etree.ElementTreeasETimportur