您可使用其他方法在需要时更新或撷取大型资料。
You can have other methods update or fetch the large data on demand.
存取子1并非自动存取子，它可撷取包含大型资料的资料行。
Accessor 1 is not an automatic accessor; it retrieves the column with large data.
存取子0为自动存取子，它可撷取所有资料行(除了大型资料的资料行以外)。
Accessor 0 is an automatic accessor; it retrieves all the columns except the one with large data.
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