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All this while, I was interviewing him, questioning him,
这一阵我一直在采访他，询问他，
and then I realized that I was getting very superficial information, or just answers to my questions.
后来我发现我只得到了很表面的信息，或只是简单地回答我问的问题。
But I really needed to dig deeper to get a new perspective.
但我真的需要再深入一点，看能不能理出新的头绪。
So I thought, well, let's observe him in his daily tasks, while he's eating, while he's watching TV.
我想从观察他的日常生活开始，观察他吃饭和看电视。
And then, when I was actually observing him walking to his dining table, it struck me,
当我看到他走去餐桌吃饭的时候，我震惊地发现，
this man who finds it so difficult to walk on flat land, how does he climb a staircase?
他就连在平地上行走都是很困难的，更何况去爬楼梯。
Because in India we do not have a fancy rail that takes you up a staircase like in the developed countries.
在印度没有像其他发达国家一样，电梯可以帮你上楼。
One actually has to climb the stairs.
大家都要爬楼梯。
So he told me, "Well, let me show you how I do it." Let's take a look at what I saw.
他跟我说：“我给你看我怎么上楼。”请看我所看到的情况。
So he took really long to reach this position,
他花了很长的时间走到了这个位置，
and then all this while, I'm thinking, "Oh my God, is he really going to do it?
这段时间我一直在想：“天啊，他真的要这么做么？
Is he really, really going to do it without his walker?" And then ...
他真的要不用拐杖走楼梯么？”然后...
And the turns, he took them so easily.
然后他很轻松的转弯。
So -- shocked? Well, I was too. So this person who could not walk on flat land was suddenly a pro at climbing stairs.
所以，震惊了么？我也震惊了。一个不能在平地上走路的人，爬楼梯却非常顺利。
On researching this, I realized that it's because it's a continuous motion.
通过研究，我了解到这是因为爬楼梯是一系列的动作。
There's this other man who also suffers from the same symptoms and uses a walker,
另一个同样使用拐杖的帕金森综合征患者，
but the moment he's put on a cycle, all his symptoms vanish, because it is a continuous motion.
只要骑上自行车所有的症状都消失了，也是因为这是连续性的动作。
So the key for me was to translate this feeling of walking on a staircase back to flat land.
所以问题的关键就是我如何把爬楼梯的感觉移植到平地上去。
And a lot of ideas were tested and tried on him, but the one that finally worked was this one. Let's take a look.
我在他的身上尝试了很多想法，我们看一下最终成功的想法。
