多表布局上的双线-电子邮件html

我用API调用构造电子邮件，需要显示某些块，有时是多次相同的块。 电子邮件是由表和表中的表构成的，以便显示所有内容，但有时会出现双边框，尤其是在outlook上

似乎有些人出现了双线。如何将一个表的边框合并到另一个表中？我无法删除一个，因为该块可能出现3次，并且它需要一个上边框

代码如下：

<table style="border-collapse:collapse; border-spacing:0; -webkit-text-size-adjust:none;" border="0" cellpadding="0" cellspacing="0" align="center">
    <tr>
        <td align="center" style="padding: 0px; vertical-align:top; width:440px; border-left:1px solid #000; border-right:1px solid #000;" class="container_2">
            <table style="border-collapse:collapse; border-spacing:0; -webkit-text-size-adjust:none; border-bottom: 1px solid #000;" border="0" cellpadding="0" cellspacing="0" align="center" width="100%">
                <tr>
                    <td style="width: 150px; background-color: #f4f4f6; border-right:1px solid #000; vertical-align: middle;" align="center">
                        <a href="#" target="_blank">
                            <img src="{{SmallImageURI}}" width="150">
                        </a>
                    </td>
                    <td>
                        <table style="border-collapse:collapse; border-spacing:0; -webkit-text-size-adjust:none;" border="0" cellpadding="0" cellspacing="0" align="center" width="100%">
                            <tr>
                                <td style="font-family: Arial, Helvetica, sans-serif; width:290px; vertical-align: top; " align="left" class="container_3">
                                    <p style="font-family: Arial, Helvetica, sans-serif; font-size: 12px; text-align: left; line-height: 16px; color:#000000; margin-left: 10px; 
margin-right: 5px; margin-top: 10px; margin-bottom: 10px; "><b>{{VAR}}</b> 
                                    </p>
                                </td>
                            </tr>
                            <tr>
                                <td>
                                    <table style="border-collapse:collapse; border-spacing:0; -webkit-text-size-adjust:none;" border="0" cellpadding="0" cellspacing="0" align="center" width="100%">
                                        <tr>
                                            <td align="left" valign="top" width="165" class="w170 block">
                                                <table valign="top" style="border-collapse:collapse; border-spacing:0; -webkit-text-size-adjust:none;" border="0" cellpadding="0" cellspacing="0" align="center" width="100%">
                                                    <tr>
                                                        <td valign="top" style="font-family: Arial, Helvetica, sans-serif; width:165px; vertical-align: top;" align="left" class="container_3">
                                                            <p style="font-family: Arial, Helvetica, sans-serif; font-size: 12px; text-align: left; line-height: 16px; color:#000000; margin-left: 
10px; margin-right: 5px; margin-top: 10px; margin-bottom: 5px; ">%%=v(@VAR)=%%{{VAR}}</p>
                                                        </td>
                                                    </tr>
                                                    <tr>
                                                        <td style="font-family: Arial, Helvetica, sans-serif; vertical-align: top;" align="left" class="container_3">
                                                            <p style="font-family: Arial, Helvetica, sans-serif; font-size: 12px; text-align: left; line-height: 16px; color:#000000; margin-left: 10px; 
margin-right: 5px; margin-top: 0px; margin-bottom: 5px; ">%%=v(@VAR)=%%{{VAR}}</p>
                                                        </td>
                                                    </tr>
                                                    <tr>
                                                        <td style="font-family: Arial, Helvetica, sans-serif; vertical-align: top;" align="left" class="container_3">
                                                            <p style="font-family: Arial, Helvetica, sans-serif; font-size: 12px; text-align: left; line-height: 16px; color:#000000; margin-left: 
10px; margin-right: 5px; margin-top: 0px; margin-bottom: 10px; ">%%=v(@VAR)=%%{{VAR}}</p>
                                                        </td>
                                                    </tr>
                                                </table>
                                            </td>

                                            <td valign="top" style="font-family: Arial, Helvetica, sans-serif; width:125px; vertical-align: top;" align="right" class="block container_3 w170 textalign">
                                                <p class="textalign" style="font-family: Arial, Helvetica, sans-serif; font-size: 12px; text-align: right; 
line-height: 16px; color:#000000; margin-left: 10px; margin-right: 5px; margin-top: 10px; margin-bottom: 5px; ">
                                                    <br/>
                                                </p>
                                            </td>

                                        </tr>
                                    </table>
                                </td>
                            </tr>
                        </table>
                    </td>
                </tr>
            </table>

            <table style="border-collapse:collapse; border-spacing:0; -webkit-text-size-adjust:none;" border="0" cellpadding="0" cellspacing="0" align="center" width="100%">
                <tr>
                    %%=v(uppercase(@VAR))=%%
                </tr>
                <tr>
                    %%=v(@VAR)=%%
                </tr>
                <tr>
                    %%=v(@VAR)=%%
                </tr>
                <tr>
                    %%=v(@VAR)=%%
                </tr>
                <tr>
                    %%=v((@VAR))=%%
                </tr>
            </table>
        </td>
    </tr>
</table>

{VAR}”

%%=v（@VAR）=%%{VAR}”
%%=v（@VAR）=%%{VAR}”
%%=v（@VAR）=%%{VAR}”




%%=v（大写（@VAR））=%
%%=v（@VAR）=%%
%%=v（@VAR）=%%
%%=v（@VAR）=%%
%%=v（（@VAR））=%