Answer in English, Help me prepare an answer for the IELTS speaking test in part 1.The question is:How can we avoid losing keys?

我们可以通过以下方式来避免丢失钥匙:
1. 把钥匙链接到包或裤子上，这样就不容易忘记带钥匙了。
2. 制定一个固定的放置钥匙的地方，每次出门前检查一下。
3. 使用智能钥匙手机应用程序，可以追踪钥匙的位置并进行远程锁定。
4. 使用钥匙扣或钥匙盒来保护钥匙。
5. 雇佣一名保姆或管家来照顾钥匙。

相关问题

1. Dividing Two Integers (2’) Given two positive integers A and B (A is a divisor and B is a dividend, as dividend and divisor. Output the integer result of A / B. Please compute the result without using multiplication (*), division (/) and mod(%) operator. Note: 1. The integer division should truncate toward zero, which means losing its fractional part. 2. Divisor cannot be the zero and the output must be a number.

To solve this problem, we can use repeated subtraction to find how many times the divisor can be subtracted from the dividend without going below zero. This will give us the integer result of the division. Here's the code in Python:

def divide(divisor, dividend):
    if divisor == 0:
        return None # Divisor cannot be zero
    if dividend == 0:
        return 0 # Dividend is zero, so result is zero

    # determine sign of the result
    negative = (divisor < 0) ^ (dividend < 0)

    # convert to positive numbers
    divisor = abs(divisor)
    dividend = abs(dividend)

    quotient = 0
    while dividend >= divisor:
        dividend -= divisor
        quotient += 1

    # restore sign of the result
    if negative:
        quotient = -quotient

    return quotient

In this code, we first check if the divisor is zero, which is not allowed. If the dividend is zero, then the result is zero. We also determine the sign of the result by checking if the divisor and dividend have different signs.

We then convert both the divisor and dividend to positive numbers to simplify the repeated subtraction. We use a while loop to subtract the divisor from the dividend until we can no longer do so without going below zero. We keep track of how many times we subtracted the divisor, which is the integer result of the division.

Finally, we restore the sign of the result if necessary and return it. This code should work for any positive integers A and B, as long as A is not zero.

[common 17-53] user exception: a file was added to constraint set constrs_1 after the implementation design was open. doing "save constraints" will overwrite these files. use "save constraints as" to avoid losing any data on disk.

这是一个用户异常，意思是在打开实现设计后，还向约束集合（constrs_1）中添加了一个文件。如果执行“保存约束”操作，这些文件将被覆盖。为了避免丢失磁盘上的任何数据，需要使用“另存为约束集合”。

（注：这是一条Vivado软件的命令行提示信息）