出生医学证明依据《中华人民共和国母婴保健法》出具，用于证明婴儿出生状态和血亲关系，是申报国籍、户籍，取得公民身份的法定医学证明。
SummaryIf you want to have good performance for your singleton implementation and you need to provide a constructor, you should go for the static data member implementation. In case you can default the default constructor, the two implementation strategies are equivalent performancewise. I would suggest using the block local approach as it saves having to define and initialize the singleton object in an implementation file.
，这一点在wps中也有详细论述
"goldValue": "dice(1d4+1)",
Laura BickerChina correspondent