针对小国经济的情形，试描述下述政策对国内利率、货币余额、中央银行的外汇储备和总需求的影响。试分

析资本可以自由流动的情形和资本完全控制的情形，以辨别短期和长期的不同影响。 a．政府减少税收； b．中央银行购买公众手中的国库券。 For the case of a small economy，describe the effects on the domestic interest rate，monetary balances，foreign reserves of the central bank，and aggregate demand of the following policies．Analyze the cases of full capital mobility and complete capital controls to identify the different effects in the short and long runs． a．The government reduces taxes． b．The central bank buys treasury bills from the public．