如何使用gatsby-image在不裁剪的情况下显示图像？

npm install gatsby-image

import React from "react"
import { graphql } from "gatsby"
import Img from "gatsby-image"

export const query = graphql`
  query {
    placeholderImage: file(relativePath: { eq: "your-image.jpg" }) {
      childImageSharp {
        fluid(maxWidth: 800) {
          ...GatsbyImageSharpFluid
        }
      }
    }
  }
`

export default ({ data }) => (
  <div>
    <h1>Your Page Title</h1>
    <Img fluid={data.placeholderImage.childImageSharp.fluid} alt="Your Image" />
  </div>
)