返回非空段末元素
这种方法没有任何参数
builder.CreateFile("docx")!varoDocuments=api.GetDocumentvarolements=ODocument.GetEplement0var ORun_1ORun_1.AddText)oParagraph.Push(oRun_1)!Var ORun_2=Api.CreateRunORun_2.AddTextoParagraph.Push(oRun_2)!Var OLastRunsoLastRun.SetBold(true)!builder.SaveFile("docx", "Last.docx")!builder.CloseFile();