我正在嘗試從SEC存檔網(wǎng)站中提取以下信息。1）大型加速文件管理器 2）加速文件管理器 3）非加速文件管理器 4）小型報(bào)告公司 5）新興成長(zhǎng)型公司這是它在網(wǎng)站上的顯示方式：Large accelerated filer     ?       Accelerated filer           ?Non-accelerated filer       ?  (Do not check if a smaller reporting company)         Smaller reporting company   ?Emerging growth company     ?在某些情況下，一個(gè)或多個(gè)項(xiàng)目可能不存在。我想編寫(xiě)一個(gè)通用代碼，可以為許多公司提取這些值?，F(xiàn)在我面臨的問(wèn)題是HTML的結(jié)構(gòu)正在從一個(gè)公司到另一個(gè)公司發(fā)生變化。到目前為止，我已經(jīng)遇到了3種不同的結(jié)構(gòu)（請(qǐng)參閱下面的HTML結(jié)構(gòu)）。如何編寫(xiě)代碼以跨不同結(jié)構(gòu)進(jìn)行泛化？<td valign="bottom">Large&nbsp;accelerated&nbsp;filer</td><td valign="bottom">&nbsp;</td><td valign="bottom">?</td><td valign="bottom">&nbsp;&nbsp;</td><td valign="bottom">Accelerated&nbsp;filer</td><td valign="bottom">&nbsp;</td><td valign="bottom">?</td></tr><tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt"><td valign="bottom"><font style="white-space:nowrap">Non-accelerated&nbsp;filer</font></td><td valign="bottom">&nbsp;</td><td valign="bottom">?&nbsp;&nbsp;(Do not check if a smaller reporting company)</td><td valign="bottom">&nbsp;&nbsp;</td><td valign="bottom">Smaller&nbsp;reporting&nbsp;company</td><td valign="bottom">&nbsp;</td><td valign="bottom">?</td></tr><tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt"><td valign="bottom">Emerging&nbsp;growth&nbsp;company</td><td valign="bottom">&nbsp;</td><td valign="bottom">?</td><td valign="bottom">&nbsp;&nbsp;</td><td valign="bottom"></td><td valign="bottom">&nbsp;</td><td valign="bottom"></td></tr>另一種結(jié)構(gòu)：filer&nbsp;&nbsp;<font style="FONT-FAMILY:WINGDINGS">x</font>&nbsp;&nbsp;&nbsp;&nbsp;Accelerated filer&nbsp;&nbsp;<font style="FONT-FAMILY:WINGDINGS">¨</font>&nbsp;&nbsp;&nbsp;&nbsp;Non-accelerated filer&nbsp;&nbsp;<font style="FONT-FAMILY:WINGDINGS">¨</font>&nbsp;&nbsp;&nbsp;&nbsp;Smaller reporting company&nbsp;&nbsp;<font style="FONT-FAMILY:WINGDINGS">¨</font> </font>