DataContainer.query() missing unit conversion?

Should DataContainer.query() include unit conversion? Or where will this happen? Ideally, I would like DataContainer to hold the data in its original form and then convert, slice, etc. upon query. Subsequent queries would start from the original data. Ideally, the enduser will be able to also inspect this DataContainer to verify its correctness. Today, that's impossible for some plotting functions and hard to do for others.

首先定位 DataContainer.query() 以及当前导致单位转换难以检查的绘图函数。明确在对查询结果进行转换或切片时是否必须保留原始数据可用，并在实现之前定义后续查询和最终用户检查的预期行为。