HarmonyOS RichText 展示问题

build() { 
  Column() { 
    Row({space:10}) { 
      Column() { 
        RichText(  this.item.title ?? "" ) 
          .width("100%") 
          .height(80) 
 
        Text(this.item.desc ?? "") 
          .fontSize(12) 
          .fontColor(0x9e9e9e) 
 
      } 
      .margin({left: 10}) 
      .layoutWeight(1) 
      .alignItems(HorizontalAlign.Start) 
      .justifyContent(FlexAlign.SpaceAround) 
      .height('100%') 
 
      Blank() 
 
      Image(this.item.banner ?? "") 
        .width(this.picWidth) 
        .objectFit(ImageFit.Fill) 
        .height( this.picWidth * 0.75 ) 
        .borderRadius(4) 
    } 
    .padding({left:20,right:20}) 
    .height( 20 + this.picWidth * 0.75 ) 
    .width("100%") 
 
  } 
}