$\left(\frac{3}{x-1}-x-1\right)÷\frac{x-2}{x^2-2x+1}$ ，其中x是不等式组 $\{\begin{array}{c}x-3\left(x-2\right)\ge 2\\ 4x-2<5x-1\end{array}$ 的一个整数解．

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I'm a Chinese boy. My name's Wu Qiang. I1 in Beijing now, because my 2work here. I 3in a high school, and I'm 4 Class 2, Grade 3. I usually 5 to school6bus. Sometimes I 7 a bike. My home is fifteen 8 from school. I don’t go to school 9 Saturdays and Sundays, so I always stay at home to do my homework, and it often 10 me half a day on Saturday. On Sunday I often go to the park with my parents. I have fun on weekends.

“螳螂捕蝉、黄雀在后”，从生物学角度理解，螳螂、蝉、黄雀三者之间的关系是(    )

小华是一个性格内向的孩子，在班里很少和人说话，放学后把自己一个人关在房间里，节假日也很少外出。语言木讷的小华总觉得自己一无是处，非常自卑。结合所学知识，请你告诉小华应该怎么办？为什么？