Answer these questions requiring a systematic and thorough investigation of thought.
回答这些问题都需要系统而深入的调查思考。
In order to save the problem, it is necessary to make a systematic and thorough investigation and study.
要解决问题，还须做系统而周密的调查研究工作。
The purple clay teapot culture has deep connotation in Chinese food culture, but few has done systematic and thorough research. There are three primary reasons.
中华食品文化中的紫砂茶具文化内涵深邃，较少有人做系统而深入的研究。
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