What according to your opinion would be the consequences if all yhe blood vessels were of the same size

It depends how big they are.

Explanation:

If they were all the same size the vessels in the legs, then blood pressure wouldn't be high enough for vital organs like the heart.

If they were all the size of the vessels the heart, then it'd be very easy to lose large amounts of blood when cut.

There are probably more complications that I haven't considered, but you get the gist.

hypoxemia refers to a below usual concentration of oxygen in the blood, mainly in the arteries. hypoxemia is an indication of an issue associated with circulation or breathing and may lead to various symptoms like shortness of breath.  

the condition is identified by determining the level of oxygen in the blood sample obtained from an artery. it can also be predicted by determining the oxygen saturation of the blood with the application of a pulse oximeter.  

the normal arterial oxygen is about 75 to 100 mm hg. the values underneath 60 mm hg is generally considered with the requirement for supplemental oxygen. the normal pulse oximeter readings generally range between 95 to 100 percent. the values under 90 percent are regarded as low.  

in the given case, the oxygen saturation is measured at 93 percent, hence, there is no need to administer oxygen, that is, one should withhold oxygen.