To answer the question about the doctor-to-patient ratio in Zheng's fleet, we need more information. The doctor-to-patient ratio in the U.S.A. doesn't provide any direct information about the doctor-to-total crew member ratio in Zheng's fleet.
To calculate the doctor-to-total crew member ratio in Zheng's fleet, we would need to know:
The total number of doctors in Zheng's fleet.
The total number of crew members in Zheng's fleet.
Once we have this information, we can calculate the ratio by dividing the total number of doctors by the total number of crew members in Zheng's fleet.
Without these specific details, we cannot determine the doctor-to-total crew member ratio in Zheng's fleet.