Tina, who is blind, walks through the city along the roads using her talking glasses.失明的蒂娜戴着会说话的眼镜沿着城市道路行走。
The talking glasses have cameras and an intelligent object recognition system.这款会说话的眼镜配备了摄像头和智能物体识别系统。
The glasses can recognize: a house 
, a tree 
, a road 
and lawn 
.这副眼镜能够识别：房屋、树木、道路和草坪。
When Tina enters a new road square, the talking glasses tell her - in this order - what is on her left, what is in front of her and what is on her right. For example: "tree, road, house".当蒂娜走进一个新的道路广场时，会说话的眼镜会依次告诉她她的左边、正前方和右边分别有什么。例如：“树、路、房子”。
Tina starts at the arrow, facing in the direction of the arrow, and listens to her talking glasses.蒂娜从箭头处开始，面向箭头所指的方向，听从她那会说话的眼镜的指引。
This is what they tell her (beginning with the starting square):这就是他们告诉她的（从起始方格开始）：
- tree, road, house 树，路，房子
- road, road, lawn 路，路，草坪
- tree, road, tree 树，路，树
- road, road, road 路，路，路
- tree, road, tree 树，路，树
- tree, house, road 树，房子，路
- road, road, tree 路，路，树
- house, road, tree 房子，路，树
At the end, Tina has arrived at one of the squares labeled with a letter.最后，蒂娜来到了标有字母的一个方格处。
Question:问题:
At which letter on the map has Tina arrived?蒂娜在地图上的哪个字母处到达了？
(Click on the letter to select it. Press 'Save' when you are finished.)（点击字母以选中它。完成后按“保存”。）
Explanation 解释
Answer: 答案:
B
Explanation: 解释:
There are different strategies to find the solution.有多种策略可以找到解决方案。
You can just follow the path Tina takes by following the instructions given by the talking glasses. The objects do not tell us when Tina makes a turn on the road. So if, at any location, the next set of objects match objects on more than one road, we try each road at a time. For example, if we take the road to destination A, to continue along the road, we would realise that after “tree road tree” the next (4th) set of objects should have been “lawn road tree”. However the objects are “road road road” which do not match the objects on road to destination A. So we trace back to the intersection where we chose the road to destination A and take another road. We do this until we have either tried all the possible roads or until we reach one of the targets. The figure below shows possible paths Tina can take. X indicates that she could not have continued on the path.
你只需依照蒂娜所走的路线，按照会说话的眼镜给出的指示前行即可。这些物品不会告诉我们蒂娜在道路上转弯的时间。所以，如果在任何地点，下一组物品与多条道路的物品都相符，我们就依次尝试每条道路。例如，如果我们选择去目的地 A 的道路，继续沿着这条路走，我们会发现，在“树 路 树”之后，下一组（第 4 组）物品应该是“草坪 路 树”。然而，实际的物品是“路 路 路”，这与去目的地 A 的道路物品不匹配。所以我们要回到选择去目的地 A 那条路的交叉路口，再选择另一条路。我们一直这样尝试，直到尝试完所有可能的道路，或者到达其中一个目标。下图展示了蒂娜可能走的路线。X 表示她无法继续走这条路。
Alternatively, you can check the six target squares. Only B and D match the description “house road tree”. But both squares adjacent to D do not match “road road tree”, which is the second last description. Therefore, B must be Tina’s goal square..
或者，您可以检查六个目标方格。只有 B 和 D 符合“房子 路 树”这一描述。但与 D 相邻的两个方格都不符合倒数第二个描述“路 路 树”。因此，B 必定是蒂娜的目标方格。
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