Well, do you think people can tell you their real thoughts just through phone? Without person-to-person contact, it is unlikely for you to dig deep into their minds and unlikely to get truth.
大部分情况下，英文是首句中心句，段落其他部分是支持中心句的内容，所以听到首句就是主要意思，因此这种模式相对简单，表示观点的词，比如赞成(support, be for …,go for… be on the side of…, quite agree with…)，中立( mutual, just so so, you can try it, not the best)，反对( not good, be against…, not recommend…, better avoid …)，喜欢(be favor of, like, prefer)，一般态度(it’s ok, but…)，不喜欢(dislike)，必须( must, it is necessary…)，依情况而定( it depends)，没必要( not necessary)，等等。
Another hazard for your back are the shock waves which travel up your spine when you walk, known as heel strike. A real find for our patients has been the shock-absorbing shoe insert. A cheap but very effective solution.——支持
Finally, a word about the state-of-the-art relief- the TENS machine-a small battery-powered gadget which delivers subliminal electrical pulses to the skin. Our experience indicates that your money is better spent on the more old-fashioned remedies.——反对
It can be useful to get special orthopaedic chairs, but remember the most important improvement should be in OUR posture.——中立
Though absolutely flat shoes can be a solution for some, others find their posture suffers——中立