====== 常用预置对象 ======
    * [[reference::conditionitems|边界条件对象]]
    * [[reference::propertyitems|单元属性对象]]
    * [[reference::materialitems|材料子项对象]]
    * [[reference::analysisitems|分析设定对象]]
    * [[reference::resultitems|结果对象]]
    * [[reference::sectionitems|截面对象]]