serializer.writeUint64(hi, lo)
写入一个原始的64位无符号整数，分为高32位和低32位部分。用于自定义serializer._writeHostObject()内部。
【Write a raw 64-bit unsigned integer, split into high and low 32-bit parts.
For use inside of a custom serializer._writeHostObject().】
写入一个原始的64位无符号整数，分为高32位和低32位部分。用于自定义serializer._writeHostObject()内部。
【Write a raw 64-bit unsigned integer, split into high and low 32-bit parts.
For use inside of a custom serializer._writeHostObject().】