This reduces the effort to write and maintain the schema, as well as ensures that no complex type is accidentally left inextensible.
这减少了编写和维护模式的工作量，还确保了不会有某个复杂类型被偶然遗漏而不能扩展。
3
An accumulating body of research indicates that some distinctions between one type of elder care and another have little real bearing on how well residents do.