Step 1: Understand the concept of 即期外汇交易 (Spot Foreign Exchange Transaction)
即期外汇交易是指在交易日后两个营业日内进行交割的外汇交易。

Step 2: Recall the standard settlement date for spot foreign exchange transactions
The standard settlement date for spot foreign exchange transactions is typically two business days after the transaction date.

Step 3: Identify the correct answer based on the standard settlement date
Given that the standard settlement date is two business days after the transaction date, we can directly provide the answer.

The final answer is: $\boxed{两个营业日}$