假设一个国家存在哈里斯托达罗问题，即由于某种原因，城市的工资比农村的工资高出许多。制造业生产没有效率；但

同时，由于农村工人向城市迁移寻找高工资的工作而存在较高的城市失业率。那么什么政策或政策组合可以解决上述问题？

Suppose a country has the Harris-Todaro problem．That is，for some reason urban wages are much higher than rural，leading to inefficiently low manufacturing production，but at the same time there is high urban unemployment because rural workers migrate to the cities in search of high-wage jobs．What policy or combination of policies would you advocate to solve this problem？