To make sure the stability and lower the transient overshoot of the LDO, a buffer stage is used to isolate the passelement and the output of the error amplifier.
To build a list, you simply pass an element to another list.
构建列表时，只是把元素传递给另一个列表。
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To do so, it will pick off the first element of the list — the head — to do the processing on that element, and recursively pass the rest of the list to itself again.