Discord.py (不是重写)。如何接受on_message的多个输入

import discord
from discord.ext import commands

bot = commands.Bot(command_prefix='!')

@bot.event
async def on_message(message):
    if message.content.startswith('!hello'):
        await message.channel.send('Hello!')
    elif message.content.startswith('!bye'):
        await message.channel.send('Goodbye!')
    elif message.content.startswith('!help'):
        await message.channel.send('I can help you with various commands!')
    else:
        await bot.process_commands(message)

bot.run('YOUR_BOT_TOKEN')