What is blood drawn after a meal to test?

Some items of general biochemical examination advocate blood sampling before meals, such as blood sugar (fasting), blood lipid, liver function, renal function, hemorheology, immunoglobulin, rheumatoid factor, anti-"O" and C-reactive protein. In addition to the above items, other items have no strict requirements for fasting examination, but from the perspective of accuracy and reference significance, fasting is the best.