You do so via the seek method, which takes a single parameter that indicates where in the file you want to start reading or writing (for example, zero indicates the start of the file).

回到开头要通过seek方法进行，它接受一个参数，表示要从文件中的什么位置开始读取或写入(例如，0代表文件开头)。

youdao

These drugs are called targeted therapeutics and have far fewer side effects than chemotherapy drugs because they spare healthy tissues and zero in on the cancer cells they seek to destroy.

这类药物被称为靶向型治疗药并且与化疗药物相比副作用要小得多，因为这类药物不损伤正常组织仅消灭所寻找到癌细胞。

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Parties involved in conflicts must reject the zero-sum mentality. They should settle disputes through dialogue, address differences through consultation and seek reconciliation with tolerance.

冲突各方应摒弃零和思维，以对话解争端、以协商化分歧、以宽容求和解。

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But to seek to keep inflation above zero is hardly to risk hyperinflation.

ECONOMIST: The new danger

Call it a speculative mania if you must, but zero interest rates are forcing otherwise cautious cash savers the world over to seek out hard-asset protection for their wealth.

FORBES: Silver Soars As Speculators Dive Into The Devil's Metal

Ms. Birnbaum said it is still hard to tell how many people will seek compensation for cancers they believe they developed as a result of working at or around Ground Zero and how costly those illnesses will be.

WSJ: 9/11 Fund Sets First Payments