情境判断分析

阅读下面短文，从短文后各小题所给的A、B、C三个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。

    The book I read is A Picture to Remember by Sarah Scott-Malden. It's1 a girl called Christina. One day, when she was waiting at the traffic lights, she 2 two men with a gun in a car next to her. They were bank robbers（抢劫者）and she saw 3 faces. They didn't want her to tell the police, so they planned to kill her.

    At first, one of the robbers attacked（攻击）Christina near the park, but 4 she only got her arm hurt slightly. After she called in her friend, Philippe for help, they were5 in the street when the robbers drove their car into them. Philippe was6seriously and had to go to hospital. When Cristina visited Philippe and left the7, the robbers followed her. Christina saw that they had a gun and understood 8 they want to do. She was scared, but she kept calm. The robbers were close behind her, but they were driving 9 fast that they couldn't stop the car and it turned over, so the police caught 10 the robbers. That's the end of the story.

有____个三角形

$\sqrt{1\text{+}\frac{1}{1^2}\text{+}\frac{1}{2^2}}\text{=}1\text{+}\frac{1}{1\times 2}$ ，

$\sqrt{1\text{+}\frac{1}{2^2}\text{+}\frac{1}{3^2}}\text{=}1\text{+}\frac{1}{2\times 3}$ ，

$\sqrt{1\text{+}\frac{1}{3^2}\text{+}\frac{1}{4^2}}\text{=}1\text{+}\frac{1}{3\times 4}$ ，

……

请利用你所发现的规律，

计算 $\sqrt{1\text{+}\frac{1}{1^2}\text{+}\frac{1}{2^2}}$ + $\sqrt{1\text{+}\frac{1}{2^2}\text{+}\frac{1}{3^2}}$ + $\sqrt{1\text{+}\frac{1}{3^2}\text{+}\frac{1}{4^2}}$ +…+ $\sqrt{1\text{+}\frac{1}{9^2}\text{+}\frac{1}{{10}^2}}$ ，其结果为____．