这题是有关宏观经济的问题,（请用英语解答）谢谢.
.The Chinese leaders have vowed and adopted different macroeconomic policy tools to control inflation in the past few years but in vain.
a) List the policy tools that the Chinese government has adopted to control inflation.
b) Analyze and discuss the policy dilemma of the Chinese government from control inflation.
( Do not discuss non-economic issues here)