求翻译：为此，在一些地方甚至出台了“患者等待手术，家属献血备用”的政策，以支撑脆弱的供需平衡。媒体更是频频以“血荒”来描述这一捉襟见肘的窘况。是什么意思？

To this end, in some places and even the introduction of patients waiting for surgery, family members donate blood standby "policy of supply and demand in order to support the fragile balance. The media frequently "blood shortage" to describe the predicament of this stretched.

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为此, 的政策 de 家属献血备用 de 在一些地方甚至出台了 « 患者等待手术, », 以支撑脆弱的供需平衡.The media is repeatedly the predicament which describes by “the blood uncultivated land” this has too many problems to tackle.

For this reason, in some places have announced a "patient waiting for surgery, family blood donors ready" policies to shore up the fragile balance of supply and demand. Media more frequently to "blood shortage" to describe this predicament to make ends meet.

正在翻译，请等待...