In post-operation day @ and day @ , the prealbumin was ( @ @ ) mg/L and ( @ @ ) mg/L in EN group and it was ( @ @ ) mg/L and ( @ @ ) mg/L in PN group , which are all significantly decreased than preoperational levels ( ( @ @ ) mg/L for enteral group and ( @ @ ) mg/L for parenteral group , t = -@ , -@ , -@ , -@ , all P < @ ) , but there was no statistically significant between the @ groups ( P > @ ) .