如何访问Ruby splat参数？

def sum(*numbers)
  numbers.reduce(0) { |total, num| total + num }
end

puts sum(1, 2, 3)       # 输出: 6
puts sum(1, 2, 3, 4, 5)  # 输出: 15

def print_person_info(**person)
  puts "Name: #{person[:name]}, Age: #{person[:age]}, City: #{person[:city]}"
end

print_person_info(name: "Alice", age: 30, city: "New York")
# 输出: Name: Alice, Age: 30, City: New York

def print_first_element(*args)
  if args.any?
    puts "First element: #{args[0]}"
  else
    puts "No elements provided"
  end
end

print_first_element(1, 2, 3)  # 输出: First element: 1
print_first_element()         # 输出: No elements provided

def example_method(required_arg, *optional_args, **keyword_args)
  puts "Required argument: #{required_arg}"
  puts "Optional arguments: #{optional_args.inspect}"
  puts "Keyword arguments: #{keyword_args.inspect}"
end

example_method("hello", 1, 2, 3, name: "Alice", age: 30)
# 输出:
# Required argument: hello
# Optional arguments: [1, 2, 3]
# Keyword arguments: {:name=>"Alice", :age=>30}