Based on the assumption that 100 μg of T-exosomes are released to the peripheral tissues continuously, we used 100 μg of exosomes for injection experiments. T-exosomes (100 μg) isolated from TS/A or 4T-1 tumor removed at day 21 post tumor cell injection were injected into BALB/c mice via the tail vein twice weekly for three weeks.请问这个意思是说三周共注射100ug的外泌体吗?.