Question

After its conquest by Alexander the Great, the government of the Persian Empire

Answer 1

was maintained more or less intact

Answer 2

the Partition of Babylon (323 BC) and Partition of Triparadisus (321 BC),documents dividing up Alexander's empire between his generals after his death, use the word 'satrap' to descibe the local rulers of various provinces of the empire, a clear indication that the satrap system of provincial government under the Achaemenid Persians had been retained more or less intact,with only the personnel changing.