编辑点评： GRE写作需要大家积累一定的写作素材、锻炼自己的逻辑思维、多多积累一些有用的句子和词汇，有了这些基础以后，就需要大家根据真题来进行练习写作了。
The following appeared in a memo from a vice president of a large, highly diversified company.
Ten years ago our company had two new office buildings constructed as regional headquarters for two regions. The buildings were erected by different construction companies Alpha and Zeta. Although the two buildings had identical floor plans, the building constructed by Zeta cost 30 percent more to build. However, that building s expenses for maintenance last year were only half those of Alpha s. In addition, the energy consumption of the Zeta building has been lower than that of the Alpha building every year since its construction. Given these data, plus the fact that Zeta has a stable workforce with little employee turnover, we recommend using Zeta rather than Alpha for our new building project, even though Alpha s bid promises lower construction costs.
Write a response in which you discuss what questions would need to be answered in order to decide whether the recommendation and the argument on which it is based are reasonable. Be sure to explain how the answers to these questions would help to evaluate the recommendation.
中文翻译：
10年以前我们公司在两个不同地区拥有两座地方办公建筑。它们由两家建筑公司--Alpha和Zeta分别建造。尽管两座建筑的平面布局基本相同，由Zeta所建造的建筑造价高出了30%， 但去年的维护费用是由Alpha建的楼的50%。而且，Z大楼建成以来的能耗每年都比Alpha大楼要少。这些数据，再加上Z公司拥有稳定的员工队伍且雇员流动性很小的事实，表明我们应该使用Z建筑公司而不是A公司来建造未来的建筑工程，尽管A的标书承诺造价会更低。
写一篇回应，在其中讨论还有哪些问题需要被回答才能决定文中的推荐是否能得到预期结果，并务请解释对这些问题的回答是如何帮助更好的评估文中的建议的。