Please provide us with some samples for comparison.一楼不能加那个purposes,和comparison连个从属关系的介词都没有,而且provide的固定用法错了,是provide sb with sth或者provide sth to sb;二楼的so that we compare 完全是语法错误,so引导的是表结果的,可以说so that we can compare,你那样根本读不通顺;三楼的固定搭配用错了,是provide sb with sth或者provide sth to sb;四楼的用词不当,这里的“提供...做参考,对比”不能用offer,五楼的开头please can you就已经很奇怪了,testing更是大错特错!而且还没宾语