So bank reserves matter because they are the foundation for other, "broader" kinds of money-current (checking) accounts, interest-bearing deposits and so on.
The teller can see how much money is in my checking and savings accounts.
出纳员可以看到我的支票和储蓄账户上还有多少钱。
3
All of the money Banks lend, perhaps only fleetingly, winds up in checkingaccounts, savings accounts, business accounts and other instruments that are measured as part of M2.