Verlee good question. My uncle also learnt it thru experience.
Key success factor is DO NOT ask for mc .Wait for the loctor to initiate it.
For cny you can say I don't think I can rest properlee to leecover during the 1st 2 days as there will be visitors so pls kindlee cover me longer.
KNN my uncle learnt it thru the hard way.
Once my uncle scheduled for a rubber band ligation to prepare for a long mc together with his planned leave and he was too monkey urging aka 猴急 the moment the surgeon came in the ot he asked for it and guess what he said ? Bloodlee hell he told my uncle nope I can onlee cover the most today and some people don't even need mc wtf. After the procedure it was fucking painful that My uncle leelee leequired at least 1 week rest without genging then he can feel it should be quite painful as he tied 2 piles but this fucking loctor die die onlee gave 2 days including that day. My uncle had actuallee thought to lodge a complain then he was too tired and weak to do it. He simplee just went gp to extend the mc.